Sierra recommends a 6.5” twist barrel for the #9290 22 cal 90 gr HPBT bullet however for cartridges like the Valkyrie, that can push them over 2650 fps muzzle velocity, a 7” twist barrel will stabilize the bullet correctly.
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Well I’m glad I ordered a 6.5 inch twist Bartlein barrel for my bolt gun to shoot 90gr at 2900fps. Now what do I do? Will I be shredding bullets?
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No if you tried shooting 55gr at high velocity then you might run into issues.
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I’m gonna stick with the heavier bullets if it works out. 75gr and above.
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When will we see and be able to purchase heavier Varmint bullets 65 to 85 grain (explosive) in .224 caliber. I have the 224 Valkyrie 1 in 7″ twist barrel for Prairie Dogs. I shot over 400 rounds in June in SD, most of the heavier bullets were target HP’s (not much fun). Thanks for all the info.
John
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You would think Sierra would be out in front of this and making new match grade varmint bullets for the 224Val. Same for Berger.
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I like the heavy bullets to buck the wind on the long shots
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what is the B.C. of the sierra 90 grain bullet?
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