9mm 115 MPR

[Jacob Wilcox]

[Eric B]

OAL: 1.075
Charge: 4.2 grains TiteGroup
Brass: New Starline

Test Gun: CZ75B Omega
Average velocity: 1147 (10 shots)
SD: 6

[james.maple]

Any data for using N320 with these bullets?
What OAL should I use? Thanks for any help

[Eric B]

@James:
Use any book data for N320 that you have for 115 grain jacketed bullets, start at the lowest end. You can use the same OAL I used above, 1.075, but I’ve run these bullets as long as 1.10. Keep in mind, that their profile is not conducive to guns with a short throat if they are loaded long. As long as you start at the minimum charge, and test as you work up, you’ll be fine.

[james.maple]

Eric
Thanks I started with 3.5 grains of N320 and worked my way up 3.8 and worked great with a oal of 1.10 to 1.116. At 3.5 grains I had one stove pipe out of 5,at 3.7 I had 2 stove pipe out of 5 ,at 3.8 and 4.0 grains all rounds cycled fine. will be checking the cases for over pressure but at first look all looks good. Once again thanks for the help

[Todd H]

Double post. I missed the existing section for the 115MPR. Apologies…

Glock 17.5 w a bunch of mods.
Powder: 5.7gr MP165 from American Reloading (says to use BE86 data)
Primer: CCI500
Brass: mixed used
COAL: 1.033″
Velocity per labradar: right at 1200fps
Grouped just over 1″ for 3 shots, shot supported.

***Info only. What works in my pistol may not work in yours. Always work up your own loads.

[Author]

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