Edward429451
member
After getting an M1A I began reloading for it, and My sons/BIL's 700 Remmy's. Many of the reloads would not chamber in the 700's. Advice gotten here was to give the sizing die an extra 1/8 to 1/4 turn. In between doing that and even running them through the sizer twice (?) seemed to help a little but did not cure the problem 100%.
I've been doing some reading and have found the true cause aside from the remedy which some suggested. The M1A is a 7.62 X 51 chamber, and the 700's have a .308 Win chamber. The difference being that the 7.62 chamber has an additional .013 of headspace, so when a round is touched off it blows the shoulder further forward than it would in a commercial 308 chamber. Sizing sets it back some, but not enough to ensure correct dimensions for commercial chambers. Rounds that would not chamber in a commercial chamber would chamber nicely in my M1A. Problem identified.
Some of the info I've been reading indicated that not all .308 sizer dies are constructed the same. Some dies do not touch the shoulder at all, merely resizing the neck. Others do. I have Dillon 308 dies. Are Dillon's neck sizers only?
I plan to go to using purely mil spec brass for my M1A, and sticking with 308 brass for any 308's I load for to alleviate the problem in the future. The problem here is that I have a small boatload of 308 brass, which has been mixed, some shot in my military chamber, some in commercial, and want to be able to use it. Can it be done or should I just cut my losses and start from scratch here?
I want to be able to load 7.62 and 308's on the same set of dies. Is this feasible? Should I be using a particular brand of die(s) to accomplish this? Also, even if I had a die that would set the shoulder back enough to make my reloads work in the remmy's, would this be overworking the brass?
Also, since the commercial 308 chamber is shorter than the military chamber, would it be feasible or advisable to have the remmey bored out to mil spec dimensions? (Keeping in mind the charge differences for brass construction.)
Need some input on this to clear the moud.
I've been doing some reading and have found the true cause aside from the remedy which some suggested. The M1A is a 7.62 X 51 chamber, and the 700's have a .308 Win chamber. The difference being that the 7.62 chamber has an additional .013 of headspace, so when a round is touched off it blows the shoulder further forward than it would in a commercial 308 chamber. Sizing sets it back some, but not enough to ensure correct dimensions for commercial chambers. Rounds that would not chamber in a commercial chamber would chamber nicely in my M1A. Problem identified.
Some of the info I've been reading indicated that not all .308 sizer dies are constructed the same. Some dies do not touch the shoulder at all, merely resizing the neck. Others do. I have Dillon 308 dies. Are Dillon's neck sizers only?
I plan to go to using purely mil spec brass for my M1A, and sticking with 308 brass for any 308's I load for to alleviate the problem in the future. The problem here is that I have a small boatload of 308 brass, which has been mixed, some shot in my military chamber, some in commercial, and want to be able to use it. Can it be done or should I just cut my losses and start from scratch here?
I want to be able to load 7.62 and 308's on the same set of dies. Is this feasible? Should I be using a particular brand of die(s) to accomplish this? Also, even if I had a die that would set the shoulder back enough to make my reloads work in the remmy's, would this be overworking the brass?
Also, since the commercial 308 chamber is shorter than the military chamber, would it be feasible or advisable to have the remmey bored out to mil spec dimensions? (Keeping in mind the charge differences for brass construction.)
Need some input on this to clear the moud.