Originally Posted by soundguy
that was going to be my next question. I know in my manuals there are different laoding specs for m1 garand and 30-06 springfield. but I havn't specifically looked if there was a seperate listing for 762x51 vs 308w
and if there was. would there ben any problem loading to the lower ( assumed ) 76251 spec and shooting that in a 308 chmabered weapon? ( if I had a 762.. which I don't know if I do or not..
The Garand specific data is due to the rifle design not the chamber specs. The Garand Gas system requires powders that are on the fast to medium side of the spectrum for the 30-06. Burning slow powders in the Garand can allow to much gas to enter the gas port resulting in a bent Operating Rod or damaged bolt. Port pressure is not the same as chamber pressure, nor are there direct corollaries: low chamber pressures do not necessarily mean low port pressures, and vice versa.