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+1 to Greg.14" twist is standard but it wouldn't hurt to run faster in case you want to try a 275 (if you can find them). My Whelen is, believe it or not, an 18" twist (or is it 16"?) because way back in the prehistoric era when I built it that was the only .35 cal barrel blank available to me. Rechambered recently to Ackley Improved, it shoots Barnes 225 TSX's at 2670 fps into about 1 MOA out to 300 yards. Haven't killed anything with it yet, but no accuracy complaints...
+1 to Greg.
14" twist is standard but it wouldn't hurt to run faster in case you want to try a 275 (if you can find them). My Whelen is, believe it or not, an 18" twist (or is it 16"?) because way back in the prehistoric era when I built it that was the only .35 cal barrel blank available to me. Rechambered recently to Ackley Improved, it shoots Barnes 225 TSX's at 2670 fps into about 1 MOA out to 300 yards. Haven't killed anything with it yet, but no accuracy complaints...
