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arizona98tj posted Barnes data for Barnes non-toxic/no lead bullets. While Barnes bullets are excellent, those loads have nothing to do with 62 grn. SS109/M855 steelcore/green tip NATO bullets. The unleaded bullets are longer than those containing lead and it is not reasonable to infer anything from that data is appropriate for steel core bullets.
1:9 twist is fine for 62 - 75 gr bullets. I like the Hornady 75 gr HPBT and they shoot great at long range in my Savage bolt gun. Conversley, as others have noted, you should not expect great accuracy from the steel core bullets.
Also note that steel core and steel clad (even if they look like copper, but stick to a magnet) are not allowed at many ranges, particularly any located on National Forest land.
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