I run the 156 and the 144 Bergers using a Hawkins M5 bottom metal and a 3 round 300RUM SSSF Accurate Mag. Never have had an issue. Call RedHawk they will steer you right. Hawkins also makes their Hunter M5 bottom metal now along with a mag that will work.
I also have a 270WSM built on a long...
This is for the Gunwerks Long Actions. This is Picatinny spec. The first iteration of these were "Weaver type". These are brand new and never used. Comes with new screws and anchor pin. Proprietary to Gunwerks actions only. $65 delivered
This is for the Gunwerks Long Actions. This is Picatinny spec. The first iteration of these were "Weaver type". These are brand new and never used. Comes with new screws and anchor pin. Proprietary to Gunwerks actions only. $65 delivered
These 6mm blanks from PBB used to be 3 grove. Mine is actually a 3 grove. Looks like they moved to 5R now. Curious which one @Justice1327 has, looks to be 5R. I bought mine about 1.5 years ago.