I've asked this question about a million times and gotten 10 million different answers. But, Ruger guys seem smarter than anyone else so I'll go with whatever concensus you come up with.
1. What is the bullet diameter of a 7.62x39 SUPPOSE to be?
2. Do all ammo companies load the same diameter?
3. Do all rifle companies make their guns with the same groove diameter?
I have had answers that suggest variation between 308 and 311. One guy even tried to tell me Ruger barrels were tapered internally(!) and started out 311 but squeezed the bullet down to 308 by the time it got to the muzzle.
1. What is the bullet diameter of a 7.62x39 SUPPOSE to be?
2. Do all ammo companies load the same diameter?
3. Do all rifle companies make their guns with the same groove diameter?
I have had answers that suggest variation between 308 and 311. One guy even tried to tell me Ruger barrels were tapered internally(!) and started out 311 but squeezed the bullet down to 308 by the time it got to the muzzle.