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Old 09-02-2007, 06:35   #84
Senior Member
Join Date: May 2007
Location: Bayarea, P.R.Kalifornia
Posts: 211
Keep in mind the FBI slowed the 10mm down to 980 fps, so it would penetrate an average of 17.9". They wanted 18" of penetration, and, they got it.

The odd part about the 10mm is when you use the .40 bullets, at least the 180 GD's, 300 fps gives you maybe, a .5" more penetration, but, the bullet expands much better, up to .97 inches, vs the .6-.7" that the 40 usually opens up to.

S esq.
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