BR4s are not hard so much as they have a thicker cup than others.
Back in the days of converting 308 range rifles (no change to firing pin hole in bolt) to 6MM BR for F Class it was quite common to...
Type: Posts; User: zimmer
BR4s are not hard so much as they have a thicker cup than others.
Back in the days of converting 308 range rifles (no change to firing pin hole in bolt) to 6MM BR for F Class it was quite common to...