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my old 1996 adi manual has 2206 with 150 grn pill at 43 grns for 2820 BUT its a 24" barrel so deducting...???...40???fps per inch would give 160fps reduction to 2660fps.
so what you getting isnt ideal but not completely out of ball park.
2600 fps was at 42.5gn and giving me 0.5 moa(four shots), i got flat primers and ejector marks at 43.5gn@2690 but it was grouping badly.
It will do the trick but i was hoping for 2700
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