I'll be curious how this works out for you. A few years back I had a pre-64 mod 70 that was opened up and rechambered to .222. Before selling it I considered opening it up further and rechambering to 224 wby. If the cost of brass wasn't so high I may have pursued it further. Instead I went the 223ai route with a different rifle. Also have a 22 CHeetah that played a part in the decision.
Good luck.
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