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Old 01-11-2016, 08:03 PM
17tbs 17tbs is offline
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Join Date: Oct 2007
Posts: 519
Default Super heavy .172" bore rider.

Has anyone tinkered with the idea of a super heavy .172"?

I copied one from a military ball ammunition example, in 4.6mm (.1815" ) using the Hornady 40gr fmj by turning it down to 4.3mm, or .172 with the front half of the bearing surface at .170".

It looks weird and I don't know if it will stabilize in a 1 in 9 at an estimated 2450fps from the original parent case converted to a .172"x30mm.

I just did it for grins. My 1 in 12 16".25" TC barrel in 223 is supposed to be incapable of stabilization of 69gr hpbt Sierras but it does it anyhow and ignored the calculation putting it at about .83 stab fact.

Last edited by 17tbs; 05-05-2016 at 04:09 AM.
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