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Just paraphrasing, but it seems that a shorter, heaver, lead based bullet (no solid copper) that has a high rpm shot from a barrel with shallow, rounded grooves will pass through the transonic zone better than other sorts of bullets. Some posters claim their bullets are accurate 100s of yards beyond the transonic zone, with a couple of Englishman claiming they are shooting targets 2500 yds with .308 subsonic bullets.
Of course, the thread then degenerates into conversations about sabots with fins, true Mil sighting systems, solid copper bullets, etc. In my experience, some of these threads have the same structure as a herd of cats, and not just in that forum.
I’m sure there are people on this board who know about this stuff, but it sure isn’t me.
I suggest you sign on that board if your interested in rifle shooting. It’s free and they have some very interesting threads going.
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