About three weeks ago, I bought a Springfield EMP 40.
My first shooting session was trouble free; I shot 200 rounds consisting of four different hollow points (50 rounds each of Federal, Remington, and Winchester 180 JHP, plus 50 rounds of Ranger T 165).
Next, I installed a Smith & Alexander stainless MSH, so I could get rid of the internal lock. Modification number two was to fit a Cylinder & Slide thumb safety, as I don't need an ambi version, as originally installed. I used an XP 25# Wolff mainspring to insure positive primer impacts; after leaving the pistol cocked for a week I was not disappointed, positive impact regardless of brand.
I sent the magazines to logman on the 1911 forum for his flush fit modification, super work . Originally, the magazines were 8 round and extended past the frame with a oversize baseplate; the flush fit mod results in a 7 round capacity, but I definitely prefer flush fit.
Today, I ran another 25 rounds each of Ranger T and Federal 180 JHP, plus a box of Hornady Zombie Max.
My EMP 40 has now flawlessly shot 270 rounds and I love it, no complaints.
EMP 40 chrono results (average for at least 5 shots):
Remington 180 JHP @ 935 fps / 350# KE / PF 168
Federal 180 JHP @ 944 fps / 356# KE / PF 170
Winchester 180 JHP @ 952 fps / 362# KE / PF 171
Winchester Ranger T 165 @ 1,054 fps / 407# KE / PF 174
Hornady Zombie Max 165 @ 1,078 fps / 426# KE / PF 178
Three of the bullets were fired into jugs filled with water; penetration was consistent, with all three stopping at the back of the third jug and denting the fourth.
The Federal 180 JHP had a recovered diameter of about .63
The Hornady Zombie Max measured approximately .70
The Ranger T was .80 - .90 (including talon) depending on which side I measured.
I couldn't easily find my good camera, so here is a cell phone pic:
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