The polymer is much slicker than copper or lubed alloy, this results in an approximate 5% in muzzle velocity increase compared to identical load data for copper jackets. Isn't the engraving by the rifling deeper than the coating? I was thinking the alloy of the bullet still was the major player in obturation by upset and in spin up?I just wish I could group like that at 25 yards, no all my testing is done with a ransom rest, so I can take the human element out as much as possible.Īs far as the polymer jacket, it has several properties that make it very unusual. I kinda thought that polymer coatings, whether PC or HiTek, were acting mainly as a barrier (and dry lubricant, maybe?) between bullet and bore. That's great shooting, there, Dragon heart!ġ00 grains? Light and fast, that one.
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