Got to the range with some 10mm to try over the chrono. Shot from my glock 40
I had settled on a 9.2gr charge of longshot with 180gr zero jhp, federal lpp, 1.27 coal when I did my workups originally without a chrono. Very happy with that choice.
Had 4 of each step still left in a box from the original workup . Pretty small batch for a series so probably not worth reporting those....and I may have forgot to push button on chrono for one series.... but numbers looked good and made sense.
9.2gr longshot 180gr jhp zero 1.27 OAL, 14 rounds:
Average 1333fps
ES 33
SD 10
Pretty happy with those numbers!
The 4 rounds of max load at 9.5 grains only gained 9fps average, but again ,small sample
Also had some factory stuff so tested what I had.
6 shots with hornady 200gr xtp:
Average 1047 fps
ES 40
SD 13.8
5 rounds of winchester 175gr st jhp:
Average 1234fps
ES 42
SD 16.5
So, i got at least one good load figured out that I dont plan on messing with .
James
10mm chronograph numbers
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