New to reloading this particular caliber. Grandson managed to acquire a DMPS with a 1 in 9 RH twist. I managed to get him some Hornady 55 gr FMJ bullets. I have primers and the only powder I have on hand that is suitable according to reloading books is IMR 4198, IMR 3031 and IMR 4895. Any recommendations which powder to go with the above mentioned bullet.

The brass I have is 400 cases marked FC and 200 marked what appears to be mixed LC.

My concern is will these particular bullets hold up in a 1 in 9 twist rate. The reloading books I have list 1 in 10 rate for the data and they caustion using some bullets due to rate of twist.

My other questions is with the 1 in 9 twist, what would be the maximum and minimum weight bullets to consider.

Thanks.

John
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