3 main objectives of test/comparison. 1-Verify function w/ BB 45 Super 230gn FMJ-FN, 2-Compare different LEM springs, 3-Feel out the USP45FS LEM handling "mechanics" of recoil recovery and trigger prep/press.
USP Purchased a few years ago brand new. Maybe 100 rounds through it. This week - Ordered the Universal LEM Kit from HK web shop, installed myself...well my wife helped push the hammer axle through as I lined up the hammer, cocking piece and hammer rebound spring. I gave in and asked for help after repeatedly hitting myself in the eye with the small pin and spring that the trigger bar presses down on. You tube was HUGE.
Spring Combo Comparisons:
1. Light TRS / Heavy LEM HS
2. Light TRS / Light HS (blue)
3. Heavy TRS / Light HS (blue) "TGS"?
4. Heavy TRS / Heavy LEM HS
Skills Test, repeated for each spring combination. Used 3 CSAT TPI standards modifying Drill 3. All conducted at 7yds. Target used was a standard IPSC/USPSA w/ rectangle A zone.
Drills 1 & 2 used NATO 230gn Ball. Drill 3 used the BB 45 Super. All drills were perfromed from the CSAT ready position w/ elbows touching ribs and muzzle slightly elevated.
Total Ammo Count was 64 NATO and 100 BB 45 Super.
Drill 1 - Repeated x 6 - Press out, 1 hit / 1 target. CSAT standard is 1sec, my last G17 run was .73 cold.
Drill 2 - Repeated x 5 - Press out, 2 hit / 1 target. CSAT TPI standard is 1.5sec, my last G17 run was 1.49 cold.
Drill 3 - Repeated x 5 - 5 hits to body. (modified) CSAT TPI standard is 5 to body and 1 to head in 3sec, my last G17 run was 2.90 cold.
Mulligan Math averaging and scoring;
-Dropped the slowest avg score. Drill 1 avg 5/6, Drill 2 avg 4/5 and Drill 3 avg 4/5
-Out of 164 rounds, 7 of them counted as out of the A-Zone, a few barely and the rest less than an inch, all left or low.
-Drills 2 and 3 only scored and averaged the split(s), omiiting the 1st shot. The press out/1st shot results revealed on Drill 1.
Results:
Light TRS / Heavy LEM HS
.95 - Drill 1
.62 - Drill 2
.56 - Drill 3
Light TRS / Light HS (blue)
.94 - Drill 1
.59 - Drill 2
.50 - Drill 3
Heavy TRS / Light HS (blue)
.94 - Drill 1
.46 - Drill 2
.81 - Drill 3
Heavy TRS / Heavy LEM HS
.95 - Drill 1
.51 - Drill 2
.53 - Drill 3
Drill 1 fastest time was .87 w/Heavy TRS/Light HS
Drill 2 fastest time was 1.35 (.88, .47) w/ Heavy TRS/Light HS
Drill 3 fastest time was 2.72 w/ Light TRS/Light HS
Conclusion -
LEM USP 45 FS w/ BB .45 Super will work for my intended purpose of an Alaska Field Pistol (supplements the Ruger 44mag SRH). For that purpose based on my mulligan scoring and averaging - I believe that any of the spring combo's will work as there was not to great of a disparity inbetween performance and split times. One variable that definitely became a testing factor was that the slide stop notched a hole in the base of my support thumb/palm crease. Another variable was that the second box of 50 BB Super rounds felt alot "heftier" imcomparison to the 1st box, which may have been amplified by the broken skin on my support hand. The second box of BB and broken skin started with the Heavy TRS so I'm not 100% sure it got a fair shake out. BB boxes of 50 had different lot numbers and labeling.
If I wanted to repeat the test I would use standard .45 ACP for every drill and grind down that damn slide stop.
I did like the pull characteristics of the Heavy TRS/Light HS but the numbers point me to the Light LEM.
Moving forward I will have the Triji HD's installed and most likely use the Light LEM combo and possibly order the parts fot the LEM/Match Hybrid.........also curious about the DA/SA Match set up w/ decocker only.
How light has anyone gotten the DA/SA Match set up? I do have a LTT Elite and many years behind a B92
Hopefully this virus lifestyle dissapates and the BJJ gym opens backup so Iam not spending time and money on HK!
Jeremy