Greetings,
Regarding the .30-06AI and the .30 Gibbs neither is that much better than the bog .30-06 loaded to the same pressure and the Cibbs needs a lot of case forming. Still if you are into retro and prepared to work for it. .30-06 AI could be a rechamber of your original barrel but not the standard 06. Wouldn't be worried about the 1 in 10 twist. At least its not a 1 in 14. There seems to be an Omark in my cupboard as well. Hmm.
Regards Grandpamac.
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