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I had wanted to try out these rounds but ran out when I was collecting crony data a few months ago. A coworker bought some and was good enough to let me have a few to shot. The pistol used was a Sig 320 compact with a 4 inch barrel. Two 16 inch blocks of Clear Ballistics gel were used but none of the rounds passed through the first block.

The first round in bare gel had an impact velocity of 1260 fps penetrated 11.75 inches and expanded to .76 inches at it’s widest point. The second one also penetrated 11.75 inches but only expanded to .70 inches. It’s impact velocity was 1266 fps.




In the gel covered with heavy clothing the first round hit at 1263 fps penetrated 16 inches and expanded to .58 inches. The second round has a velocity of 1282 fps expanded to .59 inches and also 16 inches.

 

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Try a couple of the sites I have referenced in the past.
LuckyGunner.com

They have the widest set of current ballistic performances on the web.
 

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This is essentially the same bullet used to make Gold Dots. It's good stuff! Excellent rep.
 

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Underwood and at least one other small ammo company can't use the words Gold Dot or Speer . Only the bonded or unicor bonded in there advertising , its a dollar thang .

It does seem like finding certain bullet weights are getting harder to find from speer the 155gr used in the 40 and 10mm from them . The xtp expandes well too and even there +P load will more than likelt exceed 1200fps in the 4" class barrels . But Underwood prices are now on pare with Buffalo bore and I'll not buy any more underwood ammo .
 
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