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Thought maybe some might be interested. If not, no biggie.
All functioned, mild to moderate recoil. 4.2 is nice and soft but locks slide empty. 2 rounds needed restrike with G23. Recommend replacing striker spring.
Had to seat these bullets to 1.114-1.116" to plunk in AIM 9mm conversion barrel. Plunks in M&P, SIG P226, Beretta 92FS Brig, Beretta PX4 Storm, and CZ75B. Started with a low charge due to deep seating. No primer or brass signs of high pressure. Group sizes below. Fired 2-3 groups with each charge out of M&P, 2 with P226, and 1 with Glock. Mixed brass.
4.2 231 RMR 115 FMJ RN 1.114-1.116' CCI and S&B primers.
M&P CORE 9L with RMR type 1 3.25moa red dot, 15 yards rested (improvised rest)
5 shot groups measured center to center: 2 1/2", 1 5/8"
P226 with stock rear sight, Dawson fiberoptic front.
2 1/8", 1 7/8"
Glock 23C, Heinie Ledge rear and Warren tactical fiberoptic front sight, with AIM 9mm conversion barrel (seated short to plunk in this barrel)
1 3/4"
4.5 grains W231 same seating length
M&P with red dot, 15 yards rested
1 1/4", 2 1/8", 1 1/2"
P226
3 3/4", 3 7/8"
Glock 23C with AIM 9mm conversion barrel (seated short to plunk in this barrel)
2 3/8"
Comparison load: Xtreme 115 Plated RN, 4.5 W231, 1.138" OAL
M&P
2 3/8", 2", 1 5/8"
P226
2 5/8", 3 3/4"
Glock 23/AIM
1 5/8"
All functioned, mild to moderate recoil. 4.2 is nice and soft but locks slide empty. 2 rounds needed restrike with G23. Recommend replacing striker spring.
Had to seat these bullets to 1.114-1.116" to plunk in AIM 9mm conversion barrel. Plunks in M&P, SIG P226, Beretta 92FS Brig, Beretta PX4 Storm, and CZ75B. Started with a low charge due to deep seating. No primer or brass signs of high pressure. Group sizes below. Fired 2-3 groups with each charge out of M&P, 2 with P226, and 1 with Glock. Mixed brass.
4.2 231 RMR 115 FMJ RN 1.114-1.116' CCI and S&B primers.
M&P CORE 9L with RMR type 1 3.25moa red dot, 15 yards rested (improvised rest)
5 shot groups measured center to center: 2 1/2", 1 5/8"
P226 with stock rear sight, Dawson fiberoptic front.
2 1/8", 1 7/8"
Glock 23C, Heinie Ledge rear and Warren tactical fiberoptic front sight, with AIM 9mm conversion barrel (seated short to plunk in this barrel)
1 3/4"
4.5 grains W231 same seating length
M&P with red dot, 15 yards rested
1 1/4", 2 1/8", 1 1/2"
P226
3 3/4", 3 7/8"
Glock 23C with AIM 9mm conversion barrel (seated short to plunk in this barrel)
2 3/8"
Comparison load: Xtreme 115 Plated RN, 4.5 W231, 1.138" OAL
M&P
2 3/8", 2", 1 5/8"
P226
2 5/8", 3 3/4"
Glock 23/AIM
1 5/8"