BRH / BRX - Eurooptic
BRH / BRXRETICLESWAROVSKI OPTIK NORTH AMERICA LTD2 Slater Road Cranston RI 02920Tel. 800-426-3089Fax IK.COM2/2010
General Information:Congratulations on your purchase of aSWAROVSKI OPTIK Rifle Scope with theBRH/BRX Reticle System. This reticle wasdesigned primarily for long range shooting andtakes the guesswork out of how high to holdover a game animal or target by utilizing themarker bars or dots below the main horizontalcrosshair. The BRH/BRX Reticle will alsocompensate for wind drift by use of the windposts or ends of the marker bars for aiming.These features eliminate the need for makingturret adjustments to your rifle scope.The BRH/BRX reticles have exactly the samedistances between the bars and dots. Theyare essentially the same except for reticlethickness.BRX Reticle: Fine dimensions designed forTarget/Varmint shooting.BRH Reticle: Heavier dimensions offeringbetter low light visibility for big game hunting.The chief benefit of the BRH/BRX Reticle isthe simplicity of the system and ease of use. Agood quality range finder is the fastest methodto determine the distance to the target for themost accurate results with the BRX Reticle.You can also determine range with the reticleexplained later in this manual (see page 9).The BRH/BRX system is supported by 50factory ballistic decals, a selection chart withapproximately 500 factory loads that can beused in conjunction with these decals, and 5blank decals that can be customized to yourfactory load, reload, or preferred zero distanceby using the BRH/BRX Ballistic Calculator onour website at WWW.SWAROVSKIOPTIK.COM.1Heavy PostMain CentralCrosshairMarker Bar 1Marker Bar 2Marker Bar 3Marker Bar 4Marker Bar 5Dot 1Dot 2Dot 3Dot 4Wind PostThe BRH/BRX is Simple to Use:You’re on an antelopehunt. You are using arifle in 7mm RemingtonMagnum.1. Your range findershows the pronghorn is447 yds away.2. Look at your decal forthe load you are using.3. Look through the scopeand hold the 2nd markerbar down where you wantthe bullet to hit, and fire.Set up is simple and easy. Find your factoryload from the Ballistic Decal Selection Chartwith this manual, match your load to theappropriate decal number and sight in at 200yards. Grab your range finder and you’re readyfor any reasonable long distance shot.Sighting in Distance:The zero or sighting in distance for the BRH/BRX system is based on a 200 yard zero on themain central crosshair. This zeroing distancehas always been favorable for long range2
hunting cartridges. In most instances, you willonly be between 1 and 2 inches high at 100yards with a 200 yard zero. If you wish to zeroyour reticle at 100, 250, 300 yards/meters orany other distance, there is no reason youcan’t. Simply access the BRH/BRX BallisticCalculator at WWW.SWAROVSKIOPTIK.COM. Enterin the appropriate ballistic information(ballistic coefficient and velocity being themost important), desired zero setting andenter the resulting downrange values of themarker bars and dots on the blank decalsprovided.Decal Choice and UsageEvery cartridge has its own unique trajectory.Some trajectories are virtually identical amongthe thousands of cartridges in existence.SWAROVSKI OTIK has taken hundreds ofthese virtually identical trajectories andmatched them to Factory Ballistic decals thatare supplied with every BRH/BRX Reticlescope. Any one decal can be thought of as atemplate for the many other cartridges listedin the accompanying Ballistic Decal SelectionChart. The cartridge listed at the top of one ofthe 50 decals is an example for that specificcartridge listed of the downrange valueslisted on the decal, but this trajectory may bevirtually identical to many other cartridges.For example, say the cartridge you are usingis a 300 Winchester Magnum manufacturedby Federal with a 165 gr Nosler Partitionbullet with a muzzle velocity of 3050 feet persecond. This is how that cartridge is listed inthe Ballistic Decal Selection Chart:Cartridge: 300 Winchester MagnumBrand: FederalBullet Weight & Type Velocity: 165 gr Nosler Partition3050 fpsB.C.: 0.409Decal No.: use #42, 325 WSMLocate decal number 42 (see below) for a 200gr 325 WSM cartridge:This 200 gr 325 WSMdecal is the decal youwill use for your 165 gr300 Win Mag load as ithas virtually the identicaltrajectory. Write in 300Win Mag 165 gr next to theletters “Alt” on the decal.(Alt alternate cartridgewith same ballistic path).The decal is designed tobe applied to your rifle in aconvenient location whereit can be referred to easily.Recommendation:Your chosen factory cartridge may already beone of decals provided and you may simplyuse that one. If your cartridge is not one ofthe factory supplied decals, refer to the DecalSelection Chart. Once you have found yourcartridge, look across the row to the far right tosee the decal number that corresponds withthe trajectory of your chosen cartridge. Keepin mind that in many instances the appropriatedecal number will be of a different cartridge orcaliber.It is strongly recommended that you usea “sharpie” or marker to now block out thecaliber designation on your appropriate decalif it is a different caliber than the rifle you areusing. Although it is just common sense, thissmall effort may prevent someone from tryingto chamber the wrong cartridge in your rifle.The manufacturer line, the bullet weight lineand the velocity line should be blocked out,also.34
To demonstrate how the BRH/BRX systemworks combining similar trajectories, thefollowing is an example of the above cartridge’s(165 gr 300 Win Mag & 200 gr 325 WSM)exact downrange “Marker Bar & Dot” values,calculated in a standard atmosphere*, andhow they are rounded for the decal:165 gr 300 Win MagZero - 200 ydsBar 1 - 282 ydsDot 1 - 354 ydsBar 2 - 419 ydsDot 2 - 478 ydsBar 3 - 533 ydsDot 3 - 583 ydsBar 4 - 631 ydsDot 4 - 676 ydsBar 5 - 717 yds200 gr 325 WSMZero - 200 ydsBar 1 - 280 ydsDot 1 - 351 ydsBar 2 - 415 ydsDot 2 - 475 ydsBar 3 - 531 ydsDot 3 - 583 ydsBar 4 - 632 ydsDot 4 - 679 ydsBar 5 - 723 ydsRounded value for325 WSM decalZero - 200 ydsBar 1 - 280 ydsDot 1 - 350 ydsBar 2 - 420 ydsDot 2 - 480 ydsBar 3 - 530 ydsDot 3 - 580 ydsBar 4 - 630 ydsDot 4 - 680 ydsBar 5 - 720 yds* A Standard Atmosphere for these ballistic calculations is:0 feet / meters altitude or Sea Level59 degrees F or 15 degrees C78% Relative Humidity29.53 inches of mercury / Barometric PressureChanges in the atmospheric condition canchange trajectories, most notably very highaltitudes. Other factors that can change theballistic data are changes in velocity due tobarrel length or slight variations in actual borediameter.You will be able to adjust for differentatmospheric conditions or muzzle velocitiesby using the BRH/BRX Ballistic Calculator onthe SWAROVSKI OPTIK website atWWW.SWAROVSKIOPTIK.COM.5Rifle Scope Magnification and its Effect onDownrange Point of Impact Values:Please be aware that the downrange valuesof the marker bars and dots are at the riflescope’s maximum power. If the scope is ona lower power than maximum, the bars anddots will indicate distances further away thanwhat the decal indicates, resulting in a shotthat will go over the intended impact point.This happens because the reticle is in the2nd focal plane. The distances betweenthe bars and dots of the BRH/BRX Reticleare calculated at the scopes maximummagnification, in inches at 100 yards andin centimeters at 100 meters. A changein magnification will change the effectivedimensions of the distance between the barsand dots. When the magnification is lowered,everything in the field of view is getting smallerin size, but the bars and dots below the maincrosshair are staying the same size. Loweringthe magnification has the effect of increasingthe distances between the marker bars anddots.This does not indicate the scope must be onmaximum magnification at all times whilehunting. The main central crosshair valuewhere you have zeroed your scope, 200 yardsfor example, will never change regardless ofthe magnification because it is in the exactcenter of the optical axis. In most instances,if you have a shot out to 250 yards, the scopecan be on any magnification while using themain central crosshair for aiming. If you havea long shot where you need one of the MarkerBars or Dots, remember to place the scope onits maximum magnification.6
There are many more cartridges in existencethan are included in the Ballistic Decal SelectionChart included with this instruction manual.If your cartridge is not one of them, ballisticinformation can be obtained from ammunitionor bullet manufacturers web sites or catalogs.This information can then be entered into theSWAROVSKI OPTIK Ballistic Calculator on ourwebsite at WWW.SWAROVSKIOPTIK.COM.How to use the BRH/BRX Marker Bars /Wind Posts to Compensate for WindFor bullets with a B.C.* of over 0.400 (wind blowingfrom left to right)From the central vertical post to the end of themarker bar, will compensate for a 20 mph (32kph) 90 degree crosswind. The wind post inthe middle of the marker bar will compensatefor a 10 mph (16 kph) 90 degree crosswind.10 mph 20 mphRight endof MarkerBarVerticalCrosshairWindPostWind DirectionThe Marker Bar lengths and Wind Posts of thisreticle are designed to compensate for winddrift of any given cartridge. The two leadingfactors that affect downrange wind drift arethe Ballistic Coefficient (B.C.) of the bulletand Wind Speed. The ballistic coefficientof a bullet is a number assigned to it by themanufacturer, based on the bullet’s shape,that helps determine how well the bullet willtravel through air and resist wind. For mostcommonly used hunting bullets, ballisticcoefficients range from approximately 0.200through 0.600. Generally, the higher thenumber, the better the bullet’s ability to resistwind drift. You will find ballistic coefficientvalues for cartridges listed in the BallisticDecal Selection Chart.The following illustrations are a general guideusing the Marker Bar lengths and Wind Postsof the BRH/BRX Reticle:If the wind is blowing from left to right, usethe marker bars / wind posts to the right of thevertical post to compensate.If the wind is blowing from right to left, usethe marker bars / wind posts to the left of thevertical post to compensate.7For bullets with a B.C.* of between 0.320 – 0.350(wind blowing from right to left)From the central vertical post to the end of themarker bar, will compensate for a 15 mph (24kph) 90 degree crosswind. The wind post inthe middle of the marker bar will compensatefor a 7.5 mph (12 kph) 90 degree crosswind.Rightend ofMarkerBar15 mph 7.5 mphWindPostVerticalCrosshairWind DirectionFor bullets with an approximate B.C.* value of 0.250(wind blowing from left to right)From the central vertical post to the end of themarker bar, will compensate for a 10 mph (16kph) 90 degree crosswind. The wind post inthe middle of the marker bar will compensatefor a 5 mph (8 kph) 90 degree crosswind.5 mph 10 mphRight endof MarkerBarVerticalCrosshairWindPostWind Direction* Many B.C. Values can be found in the “BRH/BRX Decal Selection Chart”sheet insert with this manual8
Ranging with the BRH/BRX:BRH/BRX Increment Subtensions:A good quality rangefinder such as theSWAROVSKI OPTIK LG 8x30 is recommendedfor measuring targets at unknown distancesfor use with the BRH/BRX Reticle. If arangefinder is not available, the reticle can beused for estimating distance to the target.The distance between the bars and dotsof the BRH/BRX Reticle is calibrated in ameasurement called Mils so that the reticlecan be used for ranging. “Mil” is short for theword Milliradian, a unit of measurement. AMilliradian (or Mil) is usually described as 1yard (36 inches) at 1000 yards, or 1 meter(100 centimeters) at 1000 meters. At 100yards, or 100 meters, 1/10th the distance, 1Mil 3.6 inches @ 100 yards or 10 cm @ 100meters. It is a linear measurement that getsincreasingly wider as the distance increases,or closer together as the distance decreases.Each increment of a bar or dot, from the mainhorizontal crosshair downward, representsa distance in 0.5 Mil increments at the riflescopes maximum power. The distancebetween the 5th Bar and the top of the lowervertical heavy post is 1 Mil giving a total of5.5 Mils to work with for ranging purposes(see chart below). Note: Because the BRH/BRX Reticle is in the 2nd focal plane, themagnification must be on the highest powerin order to properly estimate range with thereticle.9Bar 1Dot 1Bar 2Dot 2Bar 3Dot 3Bar 4Dot 4Bar 5Top of LowerVertical PostEnglishMetricIn low at 100 yds Cm low at 100 m@ max power@ max power1.8 in5 cm3.6 in10 cm5.4 in15 cm7.2 in20 cm9.0 in25 cm10.8 in30 cm12.6 in35 cm14.4 in40 cm16.2 in45 cm19.8 inMils.5 Mil1 Mil1.5 Mils2 Mils2.5 Mils3 Mils3.5 Mils4 Mils4.5 Mils55 cm5.5 Mils0.5 Mil1 Mil1.5 Mils2 Mils2.5 Mils3 Mils4 Mils3.5 Mils4.5 Mils5.5 Mils10
One measurement you must know beforehandto accurately range with a Mil system Reticleis the size of the target you are shooting at.The formula for using is as follows:After determining 333 yards with the reticle,if you were using a Hornady .308 Win 150 grInterBond (Decal #20), or any cartridge thatrequires a #20 decal, your hold point wouldbe the 1st dot down, 330 yards.(Height of the Target in Yards x 1000) Height ofthe target in Mils Range to the target in Yardsor(Height of the target in Meters x 1000) Height ofthe target in Mils Range to the target in MetersExample: Your target is a whitetail deer. Known(average) chest depth is 18 inches. 18 inchesis ½ yard or 0.5 yards. You put the horizontalcrosshair on top of the deer at the shoulder.Looking down the reticle, the bottom of his 18inch chest lines up with the 2nd Bar of theBRH/BRX Reticle, or 1.5 Mils.0.5 yards x 1000 500. 500 1.5 (mils) 333 yards.Metric – 18 inches 0.5 yd .4572m0.4572 meters x 1000 457.2 457.2 1.5(mils) 304.8 (305 meters)305 meters 333 yardsNow let’s take a different example. You aregoing to be shooting on a course of fire thathas only 9 inch circular steel plates set atunknown distances. 9 inches is ¼ of one yard[9” 36” (1 yard) 0.25 yards]9 inch Steel Plate Target0.5 Mil1 Mil1.5 Mils2 Mils2.5 Mils1112
Steel Plate Target: With horizontal crosshairat the top of the plate, the bottom of the plateappears to touch marker bar 1, or 0.5 Mil.(Target size in yards) 0.25 x 1000 250. 250 0.5 Mils 500 yardsMil Charts, such as the ones below, canalso be very handy in the field for estimatingdistance. These charts are in perforated cardform in the back of this instruction manual.Mil Table for Objects in Inches[Metric – 9 inches 0.23 meters. 0.23 x1000 230. 230 0.5 mil 460 meters (460meters 500 yards)]If you were using a Federal 270 WSM 150 grNosler Partition (Decal #11), or any cartridgethat requires decal #11, after determining therange is 500 yards using the reticle, hold onthe 2nd dot down.InchesTarget Size(yds)MIL 0.51MILMIL 1.52MILMIL 2.53MILMIL 3.54MILMIL 83167120001000667500400333286250222200182Mil Table for Objects in CentimetersCentimetersTarget Size(m)MIL 0.5MIL1MIL 1.5MIL2MIL 2.5MIL3MIL 3.5MIL4MIL 4.5MIL5MIL 86250222200182Shooting at Steep or Severe Angles:Calculating this math quickly in the field isusually impractical. In a case like this whereyou know you are shooting at only 9 inchplates it will help to predetermine the mathand make up a quick reference chart.Shooting at angles uphill or downhill doesaffect trajectories. Most hunters that havetaken shots at relatively steep angles havefound that the bullet went over the back oftheir quarry. Ballistic trajectories are normallydetermined over a horizontal plane. If you takethat horizontal plane and put it at an angle,the gravitational forces on the bullet act overa “shorter” plane, meaning less bullet drop,even though the “straight-line” distance isthe same.Specific Example: You are using Decal #30as shown below. The 2nd decal on the rightshows what happens to the down rangeyardage values when the angle of the shot isadjusted for a 30 upward or downward hold.0.25 mil 1000 yards0.50 mil 500 yards0.75 mil 333 yards1.0 mil 250 yards1.25 mils 200 yards1.50 mils 167 yards1314
Your range to target is 500 yards. On ahorizontal plane, your aiming point would bethe 2nd dot down, 500 yards. But now takethis same distance of 500 yards, and “tilt” itto a 30 , up or down angle. At 30 degrees,that 2nd dot down now becomes an exacthold point for a 560 yard shot. At this 30 angle, bar 2 is equivalent to a 490 yard shot.You would want to use bar 2 (marked 430yards) for this 500 yard, 30 angled shot.Standard Decal # 30(Trajectory Determinedover Horizontal Plane)30 degree angleadjusted downrangeyardage values.Practically speaking, it is difficult to determineangles in the hunting field. If you find yourselftaking a fairly long shot at a steep angle (30or 40 degrees), an easy “Rule of Thumb” forthe BRH/BRX is to hold to the next Bar or Dotabove where you normally would that will letyou compensate for the angle.15Tips for Using the BRH/BRX Reticle System: Memorize the 1st three downrange yardagefigures. If marker bar 1 for your caliber 280yards, dot 1 350 yards, marker bar 2 420yards, commit to memory 28, 35, 42. The vastmajority of long shots taken will most likelybe under 500 yards. Memorizing beforehandthe 1st three distances will allow you to keepyour eye on the animal while possibly savingcritical seconds. Do not think that because you are shootinga certain caliber and bullet weight, and havefound a decal for that caliber and bulletweight, that you can automatically use thatdecal with accurate results. As an example,the BRH/BRX system offers nine differentdecal choices for the .270 Winchester using130 grain bullets while there is only 1 decallabeled for a 270 Win with a 130 gr bullet. Turn the scope to its maximummagnification before using the marker barsor dots for aiming. The scope can be on anymagnification where closer shots using themain crosshair will be used. The BRH/BRX system will allow theshooter to accurately make shots at very longdistances. Please be aware of the limitationsof your cartridge and your own abilities.Generally, deer size game needs 1000 ft lbsminimum and elk size game needs 1500 ftlbs minimum of remaining bullet energy tocleanly harvest. Please check your cartridgemanufacturer’s energy figures for maximumethical ranges for your cartridge being usedfor the game you are hunting. Once the proper decal for your rifle/cartridgeis determined, if the decal’s caliber is differentfrom your rifle, block out the caliber on thedecal and write in the proper caliber nextto “Alt”. This may very well prevent a wrongcartridge from being chambered in your rifle.16
BRH/BRX Subtensions for BRH/BRXNotes:The distance between the marker bars anddots for BRH/BRX for all models are asfollows:EnglishInches low at 100 yds@ max powerBar1.8 inDot 13.6 inBar 25.4 inDot 27.2 inBar 39.0 inDot 310.8 inBar 412.6 inDot 414.4 inBar 516.2 inMetricCm low at 100 m@ max powerBar 15 cmDot 110 cmBar 215 cmDot 220 cmBar 325 cmDot 330 cmBar 435 cmDot 440 cmBar 545 cmMils0.5 Mils1.0 Mil1.5 Mil2.0 Mils2.5 Mils3.0 Mils3.5 Mils4.0 Mils4.5 MilsLength of Marker Bars for all Models atMaximum MagnificationIn at100 ydsBar 1 Total length of barfrom vertical to left or right end of barfrom vertical to center of wind postCmat 100 m7.23.61.820105Bar 2 Total length of bar10.8from vertical to left or right end of bar 5. 4from vertical to center of wind post2.730157.5Bar 3 Total length of bar14.4from vertical to left or right end of bar 7.2from vertical to center of wind post3.6402010Bar 4 Total length of barfrom vertical to left or right end of barfrom vertical to center of wind post1894.5502512.5Bar 5 Total Length of bar21.6from vertical to left or right end of bar 10.8from vertical to center of wind post5.46030151718
22200182100Mil Table for Objects in Cm (Metric). Cross Reference Mil Size to Target Size in Cms to Obtain Distance to Target in Meters-.CentimetersTarget Size(m)MIL 0.5MIL1MIL 1.5MIL2MIL 2.5MIL3MIL 3.5MIL4MIL 4.5MIL5MIL 0066750040033328625022220018236Mil Table for Objects in Inches (English). Cross Reference Mil Size to Target Size in Yards to Obtain Distance to Target in Yards.InchesTarget Size(yds)MIL 0.5MIL1MIL 1.5MIL2MIL 2.5MIL3MIL 3.5MIL4MIL 4.5MIL5MIL 5.52019
SWAROVSKI OPTIK Ri e Scope with the fl BRH/BRX Reticle System. This reticle was designed primarily for long range shooting and takes the guesswork out of how high to hold over a game animal or target by utilizing the marker bars or dots below the main horizontal crosshair. The BRH/BRX Reticle will also compensate for wind drift by use of the windFile Size: 255KB
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SWAROVSKI Z8i Z8i が皆様を更なる高次元へ誘います。 . Switchable Reticle で素早くレチクル変更（New ﾚﾁｸﾙ：4A-IF） . 4A-I 4A-300I BRX-I 4W-I Z8i 2.3-18x56 本体直径：30mm（1.2 ｲﾝﾁ） 本体重量：7
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