Proof research rifling

[Michael Eichele]

I've looked at their website and other sources but can't find any info on rifling configuration. Are they 4,5,6 grooves? 5R or standard? Their website indicated cut rifling but I've heard rumors that they went to a button process. Any insight there?

Any help is appreciated.

M

 

[338 dude]

I've looked at their website and other sources but can't find any info on rifling configuration. Are they 4,5,6 grooves? 5R or standard? Their website indicated cut rifling but I've heard rumors that they went to a button process. Any insight there?

Any help is appreciated.

M

Mine are 4 grooves

 

[reeldawg]

It depends on the caliber. I believe 6MM and 6.5 MM are 4 grove. 7MM and .308s are 5 grove. None of them are 5Rs. They are cut rifling.