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Old October 7, 2012, 06:35 PM   #22
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Join Date: October 9, 2009
Location: North Alabama
Posts: 5,983
,40cal/10mm RIFLE cartridge "thumper"

A full powered rifle cartridge in .40/10mm bore diameter, capable of launching 200 gr slugs to about 2250 fps. Think of it as a 10mm magnum, or a souped up " .40 carbine".

Think I'd base it on the .308 case, to take advantage of existing mags, bolt face dia's, etc. Don't know if the case is wide enough to offer a shoulder for headspace.

The rifle would be a short barreled semi-auto, based on Coopers "thumper" concept. NOt sure of platform but rugged and reliable.
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