DF
Considering when the rifle was assembled I bet it is a 1-10. In those days the 6 Rem had the fastest twist which was either 9.5 or 9.75.
I don’t think Douglas made anything faster than 10.
SAAMI shows chamber specs, didn’t see a specified ROT like the Creed.
10 better than slower, but 8 would to me seem about right.
Hornady gives load data for their 105’s, stating 10 twist won’t stabilize it.
For my use, I’d probably rebarrel to an 8 twist 6-284 or 6.5-284. If one had a .284 itch, the patent .284 round is a good one.
There could be some major issues, converting an action modified for the .284, back to a std round.
DF
