RMR 9mm 124gr JHP in-house bullet - evaluation

Thanks for doing these tests and taking the time to post all the pictures. A quick update for those wondering about the RMR 124 HP. The bullets that Vaalpens has been testing were from the very first batch of bullets that came off the machine. They were what I would call good bullets. However, we had some issues with the tooling and the timing on the machine and we had to completely tear the machine apart and shim plungers and die blocks. We've got the press dialed in way better now and we've gotten the ogive concentricity quite a bit better. I lengthened the ogive a little but it should still work well in .357. I think these new ones coming off the machine will be even more accurate than the firsts. Or at least, they have more potential for accuracy.

Also, we now offer a 124 FMJ that is similar in ogive shape to our 115 FMJ. In a few months we should be able to offer a 147 grain FP. I'm working on a 124 FP as well.

The bullets have been tested at 1900 fps with no issues.

vaalpens,
Looks like you are haveing fun with Loudshot , I mean longshot

Can't wait for the 124 FPs from Jake.
I have some of the "New" HPs on order and will test when I get them and have a chance.

I got 1,000 of these new In House 124gr JHP's in this week and loaded up a batch using BE-86.

Mixed brass
S&B small pistol primer
5.9gr BE-86
1.065" OAL (still a bit long for my CZ P09. I can drop them into the chamber but they won't spin because the bullet has engaged the rifling)

Fired from my gen 3 Glock 17 at 3 feet from chrono.

Shots

# FPS FT-LBS PF

10 1194 392.60 148.06

9 1209 402.52 149.92

8 1221 410.55 151.40

7 1210 403.19 150.04

6 1213 405.19 150.41

5 1218 408.54 151.03

4 1227 414.60 152.15

3 1216 407.20 150.78

2 1202 397.87 149.05

1 1208 401.86 149.79

Average: 1211.80

StdDev: 9.50

Min: 1194

Max: 1227

Spread: 33

True MV: 1212.21


Shots 10 and 9 were nickel cases, intentionally loaded first so I could see what they did for the velocity. No primer flattening was observed on any of the mixed brass.

I didn't do the testing myself. I have a huge pool of eager customers who can't wait to get their hands on something new just to see if they can break it.

vaalpens said:

Thanks for sharing your chrono results. It is interesting to see that you get and average of 1211fps out of a 4.5" barrel with your 5.9gr load, where I saw 1145fps ot of my 3.9" barrel. There are obviously some other variables, but that is a nice increase in velocity with the additional .6" of barrel.

How was the accuracy for you?

Click to expand...

Could be small differences in scales, brass and primers. The S&B SPP seem to be fairly hot. I compared them to the SRP fired out of my CZ P09 and only saw an increase of 4fps average, which is basically identical power levels. I bet they are more like a magnum primer in power level.

I didn't shoot any for accuracy, I just fired them into the dirt. Maybe on my next range trip.

Not the best photo as I took it in the dark at the range last night. The bullet on the right was fired at 4 lined up water jugs, and was recovered from the third jug. The one on The left was fired at the remaining single gallon jug, and was then recovered from the dirt.

That is what they should look like. Do you know what the velocity was?

It was pretty dark so I didn't set up my chrono, but they were shot out of my CZ P09 which runs about 1.6% more velocity than my Glock 17, so I would guess 1230fps.

I finally got all of my JHP's loaded and inspected. Looks like Jake gave me 6 extra bullets in the bag.

Now they are all squrreled away in Ziploc storage bags for the zombie apocalypse.

You guys have more discipline than I do. I load ammo and almost immediately I'm looking for an excuse to go shoot it. I have 50 rnds of .308 sitting on the bench right now and it's killing me.

Thought I would add my own recent experience with the new 124 JHP.

Plunk testing them in my Witness 9mm 4.7" barrel showed they were touching the lands at a COL of 1.060", which is fairly short. My first test loads were seated to 1.040" and all passed the plunk test.

COL 1.040". Winchester small primers, mixed brass. BE86 powder. 5 rounds each.

4.4gn, 1025.8fps 1.3"@ 10 yards.

4.6gn, 1039.0fps 1.8"@ 10 yards.

4.8gn, 1094.4fps 0.75"@ 10 yards.

5.0gn, 1109.0fps. 1.4"@ 10 yards.

5.2gn, 1149.6fps. 1.4"@ 10 yards.

No pressure signs, could probably go a little higher in charge, but I was happy with the loads. Normally I have a green laser on this gun for accuracy testing, but I had moved it to another gun for testing, so I was sighting using just the iron sights and bench resting my hand. I would expect the accuracy to be better using the laser. I may work up another set of loads using 10 instead of 5 each, at least for the 3 highest charges. I may seat just a tad shorter, as I had one failure to go to battery during the test.

When I was plunk testing these bullets, I tried them in my 9mm 16" carbine. It has the tightest leade/freebore of any 9mm I have. Using my slotted 9mm case and pushing into the chamber, they all came out at around 1.059". However, when ran some dummy rounds seated as short as 1.020", the rounds still would not spin freely or fall out as they should for a successful plunk test. I'm not sure why. Anyway, I'm not really concerned about using these in the carbine as I have found an awesome load for it already using the RMR 115 fmj. But I digress.

We have a pretty limited budget. I wanted to come out with a 9mm HP bullet that would expand but could serve as many customers as possible. I knew that if I produced a bullet that didn't work for the .357 sig or .38 super that effigies would be made of me and I would be tarred, feathered, and started on fire. So, what we ended up with was a jack-of-all-trades kind of bullet. We tested them pretty extensively in several different handguns with pretty good results. We knew that they would require deeper seating than a bullet with a sharper sloped ogive but being able to work well in the .357 sig opened us up to another market that we couldn't just ignore. That said, we've gotten a lot of feedback from customers that they are very accurate bullets. I think having the longer body for more rifling contact has been a good thing for accuracy.

I’m a repeat customer. As I write this, I’m waiting for my most recent order to arrive. I’ve found these bullets to be some of the more accurate projectiles I’ve shot in 9MM. I’m using Bullseye powder.

I haven’t tested the terminal performance yet but will post results after I do. I will do likewise after I load some for .357 Sig.

I also appreciate the standing 5% discount for forum members.

longdayjake said:

I wanted to come out with a 9mm HP bullet that would ... work for .357 sig or .38 super ... a jack-of-all-trades kind of bullet.

We knew that they would require deeper seating than a bullet with a sharper sloped ogive ... having the longer body for more rifling contact has been a good thing for accuracy.

Click to expand...

RMR 124 gr JHP (0.579" length) seated to 1.090" OAL on the left and new "Jack of all trades" 124 gr JHP (0.558" length) seated to 1.040" OAL on the right - Notice the significantly longer bullet base/bearing surface of the new bullet - https://www.thehighroad.org/index.p...g-depth-and-rmr-124-jhp.821665/#post-10555373

The old 0.579" length RMR 124 gr JHP (Left in the picture):

- 1.125"+ fully chambered in older Lone Wolf/KKM barrels.
- 1.090" fully chambered in newer Lone Wolf barrel with almost no leade


The new 0.558" length RMR 124 gr JHP (Right in the picture):

- 1.125" fully chambered in older Lone Wolf barrels
- 1.120" fully chambered in KKM barrel
- 1.040" fully chambered in newer Lone Wolf barrel with almost no leade.


KKM barrel with freebore/longer leade will accommodate RMR's new 124 gr JHP to 1.120" OAL



Lone Wolf's newer barrel with almost no leade will accommodate RMR's new 124 gr JHP to 1.040"

^^Thanks bds for the pics! I think Jake has landed on a winner with this profile and longer bearing surface! My experience tells me those things will add to the accuracy.

And they look really nice, less like XTPs and more like Gold Dots, which in all my guns, always shoot better than anything else!!

Seriously BDS. Your photos are my favorite.

Thank you all.

I ordered 500 of the RMR 124gr JHP's a few weeks ago and finally got a chance to load some for 9mm. I used 5.1gr of Power Pistol and an OAL of 1.060 with a CCI small pistol primer. I don't have a chronograph yet but intend to fire into jugs of water and see what I get. Has anyone loaded these with Power Pistol and chronographed them yet?