Rmr 9mm jhp bullet info

[brubrit]

I need sone info such as powders overall completedbullet length Primers and grains of powder for an accurate everyday load ! I don’t need max pressures or vicitues. Please help. Thanx !

[Jerry Gossette]

I\’ve had excellent accuracy with W244… 4.2 to 4.4 grains, depending upon cases… Max COAL for my Taurus G2C is 1.063 (target 1.060) because it doesn\’t like the fat ogive… our other pistols (Taurus PT-111 and a S&W 5906) don\’t care as much.

[Eugene Moses Kalashnikov]

Here are the loads I tested with RMR\’s 124 gr JHP, seated to an OAL of 1.060\”:
4.5 gr Winchester 244
4.6 gr HP-38
7.8 gr Accurate No. 7
5.5 gr CFE Pistol

I tested with a Grand Power Stribog w/ Primary Arms MD-20 red dot, and a Glock 45 w/ a Holosun 508T-V2 at about 20-22 yards:

Stribog, 15 shot groups:
Accurate No. 7 – 1 hole inside of an inch with a couple flyers making a 1.75\” total group
Winchester 244 – 1 hole inside of an inch with a couple flyers making a 2\” total group
HP-38 – 1 hole inside of an inch with a couple flyers making a 2\” total group
CFE Pistol – 2\” group, kind of spread.

Glock, 10 shot groups (note, I\’m a terrible pistol marksman and these groups should probably be laughed at, The Stribog was braced and rested on a bag. With the Glock, I was shooting off hand, standing up) :
HP-38 – 3\” group
Winchester 244 – 4\” group
CFE Pistol – 6\” group
Accurate No. 7 – 7 \” group

These loads are about as hot as I would load and are at the top end of the charts. I was trying to achieve the velocity required (1150 FPS) for proper expansion.

I would rank how these \”feel\” as far as felt recoil as such starting with most powerful feeling to least powerful:
Accurate No. 7
HP-38
Winchester 244
CFE Pistol

[kerry]

Hello,
My go to for the 124gn JHP Multi purpose is Accurate #2 at 4GN, 1.05-1.10 COL for most of my 9mm guns, However I make my Beretta 92FS loads to COL of 1.60 as this Just touches the grooves for the rifling. This is my target League Pistol so that\’s why I make the COL so long. Anyway, this is to long for my 3rd Gen Beretta barrel, M9A3, these I make to 1.30 COL due the the grooves being deeper toward the camber.

[mdi255]

There is a ton of data in most published reloading manuals and powder/bullet manufacturer websites. My first loads with RMR 124 JHPs was right out of my Nosler manual. Worked great.

FWIW; I pay very little (no) attention to any data I see on a reloading forum, hear from any gun counter clerk, \”favorite loads\” forum/website, good intended friend, range rat, or gun shop guru. I get 98%+ data from published reloading manuals with some from powder/bullet manufacturer\’s web sites. I have been using this, my \”Rule #1\” for over 40 years and had one squib in \’70, and no Kabooms,. Added to this I record every load and results so I can go back and use that data for further use/experimenting…

[ppro]

mdi255 That\’s interesting…I didn\’t know Nosler listed data for RMR bullets… Unless you mean that you interpolate loads based on similar book (Nosler) data which means….it isn\’t book data for loading the RMR bullets… If you have data from Noslers book for the RMR bullets we would appreciate knowing that . Actually, I am probably at least as cautious in developing loads myself so for the RMR bullets, it\’s hard to come up with a exact match…but I am working on it 🙂

[mdi255]

My first RMR `124 JHPs looked very similar to Nosler bullets. IIRC I measured same length, weight and profile so I used Nosler data. And like \”Reloading 101\” says, begin with starting loads and work up…

I have not found an \”exact match\”, load data specifically for the RMR bullets and I don\’t know if any even exists. I did not interpolate anything I used Nosler 124 gr. JHP data for my RMR bullets straight from the book and plunk tested in my guns. I use a lot of Universal, CFE Pistol, Unique, W231, and BR-5 in my 9mm handloads…

Been reloading for a few decades so I trust my judgment and data sources. I had one squib in 1970 and no kabooms or over max loads…

[Carmon S Howard]

I\’ve loaded quite a few of the 124 gr RMR MPR in 9mm, and I generate data from QuickLoad using the Sierra 125 gr 8125. It is about the same length as the MPR and has a profile that doesn\’t accommodate long OALs in most firearms. All my barrels will plunk the MPR at 1.075\”, some will go to 1.100\”, and a couple will handle 1.125\”. Chrono data matches the QL predictions pretty well. VV 3N37 at 6.2 gr and 1.075\” is a standard pressure load and produces over 1150 fps from a 4\” barrel. If the bullet can be seated at the longer 1.125\” length, that charge can be increased by 9% with a corresponding velocity increase of about 50 fps in a 4\” barrel. My goal with these loads is to generate enough velocity for reliable expansion. If that isn\’t a priority, I would use enough W231 or AA5 to generate 1050 – 1100 fps and call it a day. 3N37 is a good powder, but it isn\’t cheap or widely available at the moment.

Attention to the seating depth is a must for the 9mm. Small changes in OAL will result in big pressure swings. For the loads above, the difference in pressure between 1.075\” and 1.125\” using the same powder charge is about 30% (according to QL), so work up carefully.

[kentcarroll]

As one of the earlier posts mentioned, the \”Fat Ogive\” is an issue with this bullet. My EGW 50-round case gauge block will \”Fail\” any rounds that have an O.A.L. greater than 1.055\”. (EGW gauge blocks tend to imitate chambers with essentially NO lead into the rifling.)

When I use the barrel from my SIG P250 as a gauge, ….I find that I can seat the bullet out to 1.110\”, and have no chambering issues at all.

In my mind, this is a problem because I own several 9mm weapons, and I would much prefer to load to one standard O.A.L. , and be confident of the functionality in all my weapons. …..Also, \”deep seating\” 9mm loads can critically effect chamber pressures and limit your max charge. ( …I have a copy of \”Quickload\”, and it is amazing how a .020\” change in seating depth alters 9mm chamber pressure!)

I love RMR\’s products, and over the past 7 years, I have used thousands and thousands of their bullets: ……But in the case of this 124 JHP, I kinda wish that they had a version that featured a more \”typical\” 9mm ogive.

…….But as a side note, this projectile is PERFECT for my 357 SIG loads, since that round requires a deep seated projectile to meet SAAMI O.A.L. specifications.

[Joe in Missouri]

I finally found this part of the forum was amazed at the data, that I was looking for and needed.

Thanks to all who contributed.

I have a LOT to learn and with this info I think I can avoid most of the big pitfalls.

Oh yea.
I am shooting this ammo in a gen 4 – G26 (baby Glock) and a gen 4 – G17 (full size)
OAL so far is 1.120\” and using 5.6g of Ramshot Silouette
I will crony this as soon as it stops raining. I am looking for 1100 FPS out of the G26 if possible.

Is there any reason to go shorter with the OAL as long as these are the only 2 guns that I will be shooting this ammo out of?
TIA

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