Here is a new TNOutdoors 9 video where he tests the Underwood 10mm 135 grain Nosler JHP.
http://www.youtube.com/watch?v=OkUm7...ature=g-high-u
Last edited by Psychlone; 10-06-12 at 09:22.
Amazingly predictable on that 135gr load. In the .40/10mm caliber, the 135gr bullet has an approximately sectional density of only 0.121. Virtually every handgun caliber that has that low of a sectional density rating has almost identical penetration to that tested 10mm load. Usually 9-10" of penetration.
According to the decades proven FBI penetration standard, it is a failure. All that extra velocity pretty much did nothing for the caliber. Bullet sectional density, mass, and construction influence projectile effectiveness far more than velocity.
Last edited by S. Galbraith; 10-07-12 at 00:24.
Insert impressive resume here.
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