I agree that 3000 fps should be possible. My RBROS 6.5X47 with a 26" Broughton drives a 130 Berger hunting at 2980 fps with lapua brass, CCI 450, and 42.2 gr of H4350. A 140 gr out of that 30" pipe should work really well if it's throated right. You shouldn't have a problem at 1000 yds if you are ok at 600. How big are your gongs? Maybe put up a whole sheet of plywood or larger gongs. I find out to 700 yds you can get away with some small errors. But from 700 to 1000 you better make sure everything is consistent. What ballistic APP are you using? If your drops line up perfectly at 600 they should be good at 1000.
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