With the set up you have the Federal may shoot better. Now drop to a smaller choke you should see numbers come up. We did 300 with Federal and most hand load guys go 320 to 330.
I'll shoot the feds through the set up to see if they do better. William I will have to call you for tighter choke for the 20 I know you turned my short barrel rem. 12 and my buddies 12 into nasty death with the hevi 6 a combo I still run when my wife is using the 20
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