I have read a lot of different things about the bore size on the Mosins. Some people say its .312 and others say its .308. I just did a little experiment and took a 7.62 round and gently placed it in the muzzle end of all my guns. The bullet will go all the way in the muzzle of the 91/30 and only stops when the case hits the muzzle. Its a sloppy fit. Two other guns allow the bullet to go almost all the way in before any resistance can be felt and my latest M44 will only let the bullet go in about 3/4 of the bullet length before it stops. Thats the same as my SKS. Is there that much difference in bore sizes on these guns? My 91/30 isnt that accurate so maybe its just worn out. What is the correct diameter of these?