[justme]

until Godfrey Reloading's Al Thornton advised me to get a small based sizer die. Also, the military uses a crimped case mouth, sealant on primer and case mouth and cannelured bullet on their ammo for a REASON.

 

[Garand]

I had the same problem with .30-06 originally. My Remington M700 in .30-06 ate anything that I reloaded for it with standard dies, with the Garand I had to buy a set of small base dies to load for it.

 

[BigBassMan]

Yep, use small base dies for my 223 an 308

 

[justme]

got to do so in autoloaders. Especially if you pick up or buy random GI brass. Fired in some of those old worn out belt-feds, the case web is stretched WAY beyond what a normal sizer die will correct.

 

[Garand]

I have found case stretching to be exceptionally bad on the .303. When full length resizing to reloading .303 brass 4-5 times, you better take a broken case extractor to the range when you shoot the gun. With .30-06 I have had 20 plus reloads out of the brass.