Hi
My competitive shooting is with bolt action rifles and routinely set the case shoulder back to match my chamber. I have used a Sinclair Bump Gauge and also the feel method by removing the firing pin from the bolt and lower the fl die until the bolt closes freely.
My son has a 308 semi auto competition rifle. We are starting to build a competitive load for it. I have seen references when using for example, Sinclair Bump Gauge set back anywhere from 0.002 to 0.004 inches. Is there a way like the feel method for a semi auto; or is it not critical on a semi auto; or use 0.004 inches.
Thanks
Robert
My competitive shooting is with bolt action rifles and routinely set the case shoulder back to match my chamber. I have used a Sinclair Bump Gauge and also the feel method by removing the firing pin from the bolt and lower the fl die until the bolt closes freely.
My son has a 308 semi auto competition rifle. We are starting to build a competitive load for it. I have seen references when using for example, Sinclair Bump Gauge set back anywhere from 0.002 to 0.004 inches. Is there a way like the feel method for a semi auto; or is it not critical on a semi auto; or use 0.004 inches.
Thanks
Robert