I use Doubletap in 10mm.
A friend of mine uses Doubletap in 40.
He did some rudimentary penetration/expansion tests and found that the 165gr and 180gr loads performed best.
http://www.doubletapammo.com/php/cat...hp?cPath=21_26
If you call the listed number, sometimes you can get the owner on the phone.
He'll tell you for what purpose he designed each load.
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Waiting for the perfect moment is a fruitless endeavor.
Make a decision, and then make it the right one through your actions.
"Whoever watches the wind will not plant; whoever looks at the clouds will not reap." -Ecclesiastes 11:4 (NIV)
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