Anyone using RMR 124gr 9mm MPR and CFE ? load advice needed

Are you talking about 9 mm? I have not used this particular bullet. But for 124 gr.
4.3 grains of bullseye is a good load that I used. Loaded 1.145 oal.

I hope they work well. I recently experimented with some .45 auto 185 gr. Hp' s from Berries bullets and I couldn't get them to mushroom no matter how fast I pushed them. The cavity would just fill up with matter and turn it into an fmj type round. But I got them at a good price. And 45 hardball has proven itself in battle.

What barrel length? A 4 inch barrel will likely be hitting the speed you're looking for in the 5.0 to 5.2 range depending on lot variations etc..

Edit:
I should note that hornady data has 5.3 as max loading hp and fp bullets at the 1.06-1.05 oal range. Their starting charge is 4.2.

Looking at Hodgdon’s online data for 125gr I think you are safe starting at around 4.5gr CFE Pistol and working up to 5gr ish or desired velocity

Why are you loading so short? What type of gun? I have those bullets and run them at 1.125” with 5.4 grs CFE pistol and they run perfectly and group tight. Brass is assorted range pickups and std SP primers.

Southernsorrow said:

yeah bud the 9mm. took 5 weeks to come

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That's good to hear as I ordered mine on December 10 so they should arrive shortly.

I've used a lot of RMR FMJ in the past but this will be my first time with the MPR so I'll be keeping an eye on this thread. I'm also planning on using CFE and was thinking about 5.0 grains as a starting load, then doing some chronograph testing to get in the 1100 fps ballpark.

right winger said:

Why are you loading so short? What type of gun? I have those bullets and run them at 1.125” with 5.4 grs CFE pistol and they run perfectly and group tight. Brass is assorted range pickups and std SP primers.

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I'll be running mine in a 4" M&P compact. What are you getting those results with?

I do my FMJ's at 1.125" and figured I'd have to actually see the MPR's before deciding what COL to start with, so your information is helpful.

Load mine to 1.060 due to short lead on my springfield xds and cz shadow 2.

Don't have cfe so can only offer oal.

Great bullets!

May not help for MAX loads as I was after something about `130 PF but for what it's worth
S+B SP, mixed range brass,charges as thrown after setting measure, 5" 9mm 1911


String: 2
Date: 8/26/2018
Time: 11:33:39 AM
Grains: 124
Hi Vel: 1040
Low Vel: 1013
Ave Vel: 1031
Ext Spread: 27
Std Dev: 10
4.7 CFE-P124 RMR MPR JHP 1.08
Velocity Power Factor Ft/Lbs
1013 125.612 282.515
1040 128.96 297.776
1038 128.712 296.632
1033 128.092 293.781
1035 128.34 294.92

Edit: I guessed a bit low probably needs about .1 more for 130.

I run that bullet in a 115 and it's a great accurate bullet. I would consider these as a target bullet so far because I have not seen good expansion. If you follow my posts you may have seen me asking about +p load precautions. It is my plan to load up a ladder of ten to the highest load of siloette powder in tha manual to see if they will open up. Loading hot is not something I do but wanted to test up to 1200 fps before saying they are a target hollowpoint. I cant immagine the 124 will act very differently but who knows. Generally I believe people buy hollow points to reduce penetration and if that is a goal I highly recommend you test them for yourself. V/r

CFE Pistol will get you there if your looking to break 1100 fps.

I have 2k of those 124s coming as well, and plenty of CFE Pistol on the shelf, so I'll be giving it a shot. My plans are start at 5gr, and work to 5.6gr which is a hair over max book load.

right winger said:

Why are you loading so short? What type of gun? I have those bullets and run them at 1.125” with 5.4 grs CFE pistol and they run perfectly and group tight. Brass is assorted range pickups and std SP primers.

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I’m running the exact load with good results.

Kaldor said:

CFE Pistol will get you there if your looking to break 1100 fps.

I have 2k of those 124s coming as well, and plenty of CFE Pistol on the shelf, so I'll be giving it a shot. My plans are start at 5gr, and work to 5.6gr which is a hair over max book load.

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I'm planning on loading some test rounds using CFE tomorrow. Then it's just waiting till I get a half decent weather day to chrono them at the outdoor range.

I think I'll start at 4.8 gr as I previously ran some 124 gr FMJ's that averaged 1044 fps with 4.7 gr of that powder, and I can't see why these would be much different. I'm hoping they'll hit 1100 at or not much over 5.0 gr. I'm thinking I'll test at 4.8, 5.0, and 5.2 and proceed from there if I'm not at the target velocity yet.

This will be using my M&P 4" compact.

mmb617 said:

I'm planning on loading some test rounds using CFE tomorrow. Then it's just waiting till I get a half decent weather day to chrono them at the outdoor range.

I think I'll start at 4.8 gr as I previously ran some 124 gr FMJ's that averaged 1044 fps with 4.7 gr of that powder, and I can't see why these would be much different. I'm hoping they'll hit 1100 at or not much over 5.0 gr. I'm thinking I'll test at 4.8, 5.0, and 5.2 and proceed from there if I'm not at the target velocity yet.

This will be using my M&P 4" compact.

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I think someone posted on RMRs website they are running 6.8gr (!) of CFE Pistol in their open gun. Definitely a 9mm Major load. Ill be interested in your chrono data too. I plan on loading these for my Compact 2.0 4" as well.

My plans are start at 5gr, and work to 5.6gr which is a hair over max book load.

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See data below, with the BERB @ 1.15 MAX is 5.5, with the SIE FMJ @ 1.09 Max is 5.1
so for the BERB 5.6 would be .1 over listed MAX, but with the SIE it would be .5gr over max, big difference.
Note that the vels for both max loads are around 1120 fps so if I had a chrono I would work up and consider around 1120 MAX
for the OAL you were using.
(assuming your don't have to go a lot shorter in which case you might not be able to get 1120 and stay within pressure limits, of course we can't measure pressure so we are guessing, when "guessing" I like to err on the side of caution)

Hodgdon Data
125 GR. SIE FMJ Hodgdon CFE Pistol .355" 1.090" 4.6 1009 26,900 PSI 5.1 1118 33,000 PSI

124 GR BERB HBRN Plated Hodgdon CFE Pistol .356" 1.150" 4.9 1006 27,300 PSI 5.5 1120 33,800 PSI

Sorry for the delay MMB617 - been helping my mom get thru a surgery. I shoot that 5.4 gr CFE-P load thru my Sig 226 and my Glock’s (17 & 19). Runs flawlessly. Now in my CZ-75 SP-01 I have to load to 1.1 with fmj’s to get same feeding results.

Southernsorrow said:

Guns used:

p320 Xcompact , Scorpion evo 8", Evo K length , p365 , P365XL and and a p320 Xfive.

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I have most of those Sigs, and in my case I load to a 1.120” COL. The max COL is longer but I’ve standardized on a 1.120. Have you checked Max COL?
I used Hodgdon online data and found a nice load towards the upper end, but not max of their data. Good luck.

Southernsorrow said:

yeah bud the 9mm. I never tried RMR's MPR jhps before but I've used many other RMR FMJ or JHP with good results. I figured hell I'll just grab 3k took 5 weeks to come but in these times you take what you can get. Previously I've been running Everglades Type 2 124gr JHP but those went up in price from 100 per 1000 to 150 per 1000.

Only Powder I have on hand is 6lbs of CFE pistol, 2/3 of a lb or less HS6 and about 5300 CCI primers

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Check out the reviews on RMR. There is some load data there. They like CFE Pistol for these bullets. https://www.rmrbullets.com/shop/bul...oint-multi-purpose-round-bullets-new/#reviews

I've just started loading these. At ~1266 fps, they grenade in gallon water jugs. First jug explodes, as you would expect, second jug has multiple penetrations, third jug has damage and leaks. Was not able to recover bullets, only one metal jacket. I don't have my load data with me, but I'll try to remember to post it later.

Oh, they also crater the surface of my steel targets, which have previously only been noticeably damaged by 5.56

I was just reading through the reviews linked in the above post. I noticed that most of the load data people posted with CFE was around 5.0 grains or a tad more. However I saw two that listed way hotter loads, one at 6.8 gr and one at 7.0 gr with CFE. Surely that can't be right? Who would load that far above any published data? Not me, that's for sure.

Southernsorrow said:

These are quite short so the max oal I'd probably run would be 1.080 or maybe 1.050 which would give me a little more ass in the brass for lack of a better term..

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Warpiece said:

I should note that hornady data has 5.3 as max loading hp and fp bullets at the 1.06-1.05 oal range. Their starting charge is 4.2.

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right winger said:

Why are you loading so short? What type of gun? I have those bullets and run them at 1.125” with 5.4 grs CFE pistol and they run perfectly and group tight. Brass is assorted range pickups and std SP primers.

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I run my FMJ rounds at 1.125" and these bullets are shorter so I figure a shorter COL would be appropriate. I made up some test rounds today, 15 each at 4.8, 5.0, and 5.2 of CFE and used a COL of 1.065". They all pluck and cycle by hand, so I don't anticipate any feed problems. Looking at the weather forecast it seems like Thursday is the only day that will not have snow or be real cold and windy so I'm planning on running them through the chronograph then.