I havent used the 22 cal projectiles, but have tried both the 6.5 and 30 cal projectiles. I used Bryn's BC for load development and sighting in. Then verified from 400 to 700 and found I needed to up the BC just a tad. Verifying will be the best bet, stick a big sheet of old ply or something behind a target at 4 or 500 and just bang away a 5 or 10 shout group.
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