Lee Q. Loader
Member
- Joined
- Jan 30, 2018
- Messages
- 444
I have 2 loads for the RMR 124 gr MPR that I like equally well for my 9mm carbine. I've probably shot around 500 of each and now I have some chrono results for those:
124 gr RMR MPR
5.6 gr BE 86 OAL 1.07
1379 1375 1330 1350 1370 1366 1333 Average = 1358
Kind of scary, Right? At the time I shot these I was getting some bad readings on the chrono and I thought it was wrong but after shooting 3 and they were pretty consistent I think they're good results. I don't ever shoot these in the handgun because they're just too stout and not fun to shoot, but as I mentioned, I've shot hundreds of these in the carbine.
With that kind of velocity in the 4" barrel these loads have got to be borderline overpressure at best, right?
Edit: For reference the Alliant 2002 manual lists 125 FMJ load at MAX charge of 6.5 grains Herco, OAL 1.15, PSI of 32,700 and velocity of 1180fps
124 gr RMR MPR
5.6 gr BE 86 OAL 1.07
1379 1375 1330 1350 1370 1366 1333 Average = 1358
124 gr RMR MPR
6.0 gr Herco OAL 1.07
1420 1400 1393 1422 1398 1411 Average = 1407
The Herco loads surprised me a bit with that high velocity. I decided to shoot a few of the Herco loads in my Ruger 9e, 4" barrel:
Here's what I got: 1260 1274 1250 Average = 12616.0 gr Herco OAL 1.07
1420 1400 1393 1422 1398 1411 Average = 1407
The Herco loads surprised me a bit with that high velocity. I decided to shoot a few of the Herco loads in my Ruger 9e, 4" barrel:
Kind of scary, Right? At the time I shot these I was getting some bad readings on the chrono and I thought it was wrong but after shooting 3 and they were pretty consistent I think they're good results. I don't ever shoot these in the handgun because they're just too stout and not fun to shoot, but as I mentioned, I've shot hundreds of these in the carbine.
With that kind of velocity in the 4" barrel these loads have got to be borderline overpressure at best, right?
Edit: For reference the Alliant 2002 manual lists 125 FMJ load at MAX charge of 6.5 grains Herco, OAL 1.15, PSI of 32,700 and velocity of 1180fps
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