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after all this, i'd still appreciate knowing from 45-70 handi owners who installed the williams WGRS peep, if a shooter can use the original front sight without zeroing problems??, and if the factory rear sight can be left alone??..thanks
Step by step procedure forselecting open sights fortapered rifle barrels.STEP ONE: Measure diameter of barrel atPoint A where front sight is to be installed.(Example: .660 Dia.). Then divide this diameterin half to determine height from center ofbore to top of barrel.(Example: .660 ÷ 2 = .330).STEP TWO: Measure diameter of barrel atPoint B where rear sight is to be installed.(Example: .820 Dia.). Then divide this diameterin half to determine height from center ofbore to top of barrel.(Example: .820 ÷ 2 = .410).STEP THREE: Select rear sight to be usedand add its height to the height determinedin Step Two. (In this case we have selectedthe WGOS with 3/8 blade rear sight whichis .560 high at its center of elevation adjustment).This gives you the total height of therear open sight from the center of the bore.(Example: .410 + .560 = .970).STEP FOUR: You now subtract the heightfrom the center of the bore to the top of thebarrel determined in Step One (.330) fromthe total height of the rear sight determinedin Step Three. (Example: .970 - .330 = .640).This tells you that you need a front sightramp and bead combination approximately.640 high to accommodate the rear sight.STEP FIVE: Using the Williams SightCombination Chart you select a ramp andbead coming closest to your height neededas determined in Step Four (.640) which inthis case would be the 7/16 ramp with.290N bead giving a height of .6375 asshown on the Chart.By following these procedures, sightcombinations can quickly and easily bedetermined. When selecting ramp andbead combinations from the Chart, theheight need not be exact as there is ampleelevation adjustment in the WGOS opensight to compensate for slight variances.Point C in the above drawing shows theproper line of sight parallel to the centerof the bore when the proper combinationis used. When ordering sights and you arestill in doubt as to the proper combinationplease include the dimensions of your barrelat points A and B so we may assist youin the proper selection.