Quote:
Originally Posted by Blacktail1
so I shoot my three shot string over the course of say five minutes taking my time . After that string is done I’m letting barrel cool down to warm as it does see temp come up fairly quickly in 257 as you probably know. When I say it “ opens up “ I go from .75 moa to 2 inch groups and it only gets worse.
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What happens if you let the barrel cool down to atmospheric temperature, instead of just to warm?