7.62 x 39 .310 ammo in .308 bore - Page 2

jetinteriorguy · June 26, 2020, 07:39 AM

I had one of the first Mini 30’s and loaded it with .308 bullets and typically after some trigger work it shot 1.75 MOA at 100yds. Then I tried some Russian ammo, Kabang. Boy that thing had some snort. At the time I was a reloading newb and had no idea there was a difference in the bullet diameters. I thought 7.62 was the same for any .30 cal bullet. After shooting about a thousand of the cheap Russian rounds through my rifle I learned why they seemed ‘hot’. Didn’t seem to hurt my rifle and I shot it a lot over the years. I did read something years later about the bore in my Mini 30. Supposedly the bore had a tapered diameter that squeezed the bullet down towards the muzzle. Not sure how true that is, but maybe Rugers way of making it so the gun could shoot all diameters of .30 cal bullets.

June 26, 2020, 07:39 AM	#26
jetinteriorguy Senior Member Join Date: April 28, 2013 Posts: 3,476	I had one of the first Mini 30’s and loaded it with .308 bullets and typically after some trigger work it shot 1.75 MOA at 100yds. Then I tried some Russian ammo, Kabang. Boy that thing had some snort. At the time I was a reloading newb and had no idea there was a difference in the bullet diameters. I thought 7.62 was the same for any .30 cal bullet. After shooting about a thousand of the cheap Russian rounds through my rifle I learned why they seemed ‘hot’. Didn’t seem to hurt my rifle and I shot it a lot over the years. I did read something years later about the bore in my Mini 30. Supposedly the bore had a tapered diameter that squeezed the bullet down towards the muzzle. Not sure how true that is, but maybe Rugers way of making it so the gun could shoot all diameters of .30 cal bullets.