Moderator/Gold Bullet member
I know the older Mini 30's had the .308 bore, but do the newer ones also have it..?? I'm not disputing what you are saying in any way, I'm just curious because I've been thinking about maybe getting a Mini 30 "Tactical" model. At some point a few years back Ruger completely re-tooled production of the Mini 14, the older (180 series I believe) rifles were notoriously inaccurate, but the newer (181 series I think) are much better, and I wonder if Ruger re-tooled the Mini 30 production line as well, but retained the .308 tube...??This concept isn't exactly new or all that radical. The Ruger Mini-30 uses a .308 caliber barrel but is designed to shoot standard Russian .310-.312 diameter 7.62x39 rounds.
Best to slug every barrel for proper bullet fit to bore.I don't know about all the surplus out there but the bullets I have pulled from 7.62x54R ammo are NOT .312" most are .3105 at best. I load both .308 FMJ (49-56 MAS) and pulled 54R FMJ (M39s and 91-30). I could see how one could get ahold of the wrong one but it's still a case of neglect. I would bet though that bullet he inadvertently loaded was a .3105" and not a true .312"
As far as Mosin Nagants go? I would slug any non Soviet bloc made barrel.