I have to change my 9mm subsonic load :(

[CMV]

My 9mm suppressor was direct thread. Light enough it would work that way on an M9 but it mostly went on fixed barrel hosts like CZ Scorpion. I have a recoil booster (Nielsen device, LID, inertial decoupler, whatever you prefer to call it) now and was disappointed that I was getting 75% malfunctions. Decided to try some factory 147gr Win Ranger (my carry ammo), and it was 100% reliable. So I think my 147gr load is a little under-powered.

ACME coated 147gr flat point
4.8gr HS-6
1.11 OAL

Thinking about switching to the RMR 124 gr match winner bullet and W231/HP38 combo. Curious what velocities people are seeing with that combo. I want to discontinue HS-6 because the only reason I had it was for the 147gr 9mm subsonic loads. I want to get at/near a max load for the recoil impulse to cycle, but velocity in the 1050 or less neighborhood even from the longer barrels like a 7 3/4" Scorpion or 10" AR

I'm almost out of the ACME 147 bullets so since I have to buy more anyway, I don't care about changing them. They're also currently almost a dime so not the significant cost savings vs a lot of other projectiles right now. I do not want to go powder shopping - W231/HP38 or at worst stay with HS-6 if there is a compelling reason, but don't want a powder than what I already keep on hand.

Oh - I also did think about just bumping up my current load a bit, but I don't think a few tenths is going to get it there. At least not reliably and across a lot of different 9mm semi autos. The Win Ranger SXT is standard pressure but clocks at about 1,000fps. My load is about 900. The RMR 147gr would seem a better choice - max load and still slow, but the note on website about it not feeding well in Glock & CZ (both of which I have extended threaded barrels and will use as hosts) ruled it out. I don't want a round nose - hollow point or flat point. My standard blasting 115gr is all round nose so I want to tell at a glance what it is

 

[dgod]

My experience has been better functioning with heavier bullets with my can. All loads have worked for me.

good luck
Dan

 

[EricBu]

You can get a 124 grain to shoot sub out of a pistol, but it is very very difficult to keep that same load sub out of a PCC. The best all around plinking 9mm round that I've found to date, 100% full function in all of my pistols and PCC's, and sub in all of them, and full function suppressed or unsuppressed is the Gallant 147 RNFP, Hi-Tek coated. MBC makes a similar bullet and that works well, but I bought 5000 of the gallants when I found that I liked them so much in so many of my guns, so they are lasting a while. I run this over 3.5 grains of TiteGroup. No detectable suppressor blow back, and super super clean shooting suppressed. The guns that I regular shoot with this: CZ75Omega w/ Osprey 9, Glock 17 w/Osprey 9, Scorpion Evo w/ Osprey 9, Freedom Ordnance FX9 w/ Hybrid 46, CZP01 unsuppressed. I use the Nielson in all the pistols, direct thread on the Scorpion, and ASR Adapter on the FX-9.

 

[Dudedog]

Not a carbine and not the match winner, but some numbers HP38 with RMR 124 MPR


S+B SP mixed range brass, charges as thrown after setting measure

String: 9
Date: 10/29/2017
Time: 9:35:27 AM
Grains: 124
Hi Vel: 959
Low Vel: 827
Ave Vel: 944
Ext Spread: 32
Std Dev: 11
RMR 124 MPR JHP 3.8 HP38 1.055 5inch 1911
Velocity Power Factor Ft/Lbs
959 118.916 253.198
945 117.18 245.859
927 114.948 236.583
945 117.18 245.859
944 117.056 245.339

String: 1
Date: 10/29/2017
Time: 9:37:06 AM
Grains: 124
Hi Vel: 1012
Low Vel: 981
Ave Vel: 998
Ext Spread: 31
Std Dev: 11
RMR 124 MPR JHP 4.0 HP38 1.055 5inch 1911
Velocity Power Factor Ft/Lbs
1002 124.248 276.413
995 123.38 272.565
981 121.644 264.948
1012 125.488 281.958
1004 124.496 277.518

String: 2
Date: 10/29/2017
Time: 9:42:14 AM
Grains: 124
Hi Vel: 1068
Low Vel: 1004
Ave Vel: 1034
Ext Spread: 64
Std Dev: 24
RMR 124 MPR JHP 4.3 HP38 1.055 5inch 1911
Velocity Power Factor Ft/Lbs
1046 129.704 301.222
1021 126.604 286.995
1004 124.496 277.518 ??? Low, light charge?
1068 132.432 314.026 Stole some powder from the one above it???
1034 128.216 294.35

Shorter OAL than Hodgdons data, lower than their start charge, was looking to just make minor PF 125 (wanted about 128-130)

Don't know how much help this will be for you if any but thought I would give it to you anyway.

 

[CMV]

Thanks. all those velocities would be good. I went back thru my references and figured out why I was using HS6 instead of W231/HP38 for 147gr loads - there's so little data for it must not be a good combo.

Were you loading them that short for feeding issues or just length you like?

 

[LiveLife]

Were you loading them that short for feeding issues or just length you like?

RMR MPR JHP nose profile is essentially their FMJ with tip cut off (And resulting longer bullet base produces great neck tension) and OAL loaded to around 1.040"-1.050" matches FMJ bullet OAL around 1.130"-1.135" and feeds like FMJ at shorter OAL. (In comparison, their old JHP had similar nose profile as Speer Gold Dot HP that needed longer OAL)

 

[Jim Watson]

Hodgdon is timid about HP38 and heavy bullets. I started with Lyman.

 

[LiveLife]

Hodgdon is timid about HP38 and heavy bullets. I started with Lyman

Here's Speer load data for comparison - https://reloadingdata.speer.com/downloads/speer/reloading-pdfs/handgun/9mm_Luger_125.pdf

• 9mm 125 gr Lead RN W231 OAL 1.130" Start 3.8 gr (911 fps) - Max 4.1 gr (982 fps)

Speer thick plated load data - https://reloadingdata.speer.com/downloads/speer/reloading-pdfs/handgun/9mm_Luger__124_rev1.pdf

• 9mm 124 gr TMJ RN W231 OAL 1.135" Start 4.0 gr (887 fps) - Max 4.5 gr (998 fps)
• 9mm 124 gr Gold Dot HP W231 OAL 1.120" Start 4.0 gr (887 fps) - Max 4.5 gr (998 fps)
• No load data from Speer for 147 gr.

And here's Hodgdon load data - https://www.hodgdonreloading.com/reloading-data-center

• 9mm 125 gr Lead CN W231/HP-38 COL 1.125" Start 3.9 gr (1,009 fps) - Max 4.4 gr (1,086 fps)
• 9mm 124 gr Berry's HBRN-TP W231/HP-38 COL 1.150" Start 3.9 gr (920 fps) - Max 4.4 gr (1,037 fps)
• 9mm 125 gr Hornady HAP W231/HP-38 COL 1.069" Start 2.8 gr (753 fps) - Max 3.3 gr (876 fps)
• 9mm 125 gr Sierra FMJ W231/HP038 COL 1.090" Start 4.4 gr (1,009 fps) - Max 4.8 gr (1,088 fps)
• 9mm 147 gr Hornady XTP W231/HP-38 COL 1.100" Start 3.0 gr (755 fps) - Max 3.4 gr (845 fps)

Lyman #49:

• 9mm 120 gr Lead RN W231 OAL 1.065" Start 3.0 gr (1010 fps) - Max 4.1 gr (1148 fps)
• 9mm 120 gr Lead CN W231 OAL 1.110" Start 2.9 gr (963 fps) - Max 4.4 gr (1264 fps)
• 9mm 125 gr JHP W231 OAL 1.075" Start 3.9 gr (960 fps) - Max 4.4 gr (1043 fps)
• 9mm 147 gr Speer TMJ FP W231 OAL 1.115" Start 3.5 gr (855 fps) - Max 4.1 gr (957 fps)