Bullet length is probably more critical than weight. When I had my #1 22-250 it shot .805" long 64gr Winchester power points well enough. 60gr Partitions not worth a dam. Best accuracy was with 55gr flat base Sierra which are .715" long. The 70gr Speer semi pointed had usable accuracy and its length is .790". Pick bullet that is short and you will be fine. Anything over .800" is going to be problematic in a 1-14. Faster you push them the better they will be.

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