IMR 3031 has always given me excellent groups but its just so temp sensitive that I move on to something else. I have a Ruger 308 that just loves that stuff and groups much like your 243.
IMR 3031 has always given me excellent groups but its just so temp sensitive that I move on to something else. I have a Ruger 308 that just loves that stuff and groups much like your 243.
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