Hi, I have been running 124 gn nukes at a OAL of 1.11, 5.0 siloughuet with a speed average 1000fps through 2 Sig p365 with zero feed issues at about 5000 rounds per unit.
Yesterday 3 of us went out with 3 different new pistols.
Me a new S&W m&p 2.0 competitor, 5 inch barrel. I could not get any to feed, the slide would get stuck in last 1/4 inch of returning to battery. And a bear to unstick.. I could get 124 match winners at same OAL to feed with no issues.
Wife new HK v9 with 5 inch barrel again will not feed but match winners would. In her case they would jam immediately.
Freind with new Glock 17 results very similar to mine.
Question is: shorter OAL? The p365’s are of 2 variants
Thanks in advance for your thoughts.
Follow up with the Rmr Nukes. I loaded up some for ladder loads with CFE powders. Data from Hornadys manual. Start load of 4.9 middle load 5.1, and max load of 5.3. Coal of 1.06. Shot 5 rnds each out of my sig p320 x compact, IWI Masada 4in bar. and 5 out of my sig p365. First let me say congrats to RMR outstanding bullet, makes me look like I know how to shoot.😆. They shot great, 4.9 and 5.1 just felt to light to me 5.3 felt better. Velocities were pretty decent.
Xcompact 4.9 avg velocity 1045.80 SD 15.16
5.1, 1086.40 SD 9.94
5.3, 1100. SD 22.79.
Masada was 4.9 1110
5.1 1157,
5.3. 1190 Sds were in the low to mid teens.
Sig p365 had low to mid 1000 velocities but to be honest I wasn’t shooting that gun worth a crap.
I did load 15 rnds at a COAL of 1.08 with cfe
From 5.3 grs, 5.6 grs and 5.8 guns and shotbthem out of my XCompact. 5.8 was snappy but no pressure signs .
5.3 vel 1108 sd 19.27
5.6 vel 1141 SD. 15.34
5.8 vel 1176 SD 11.97.
May try some at 5.5grns and 5.7 grs.
FYI all loads with CCI SPP.
Thank you for posting this. I chrono’d this load today. Started with 5.2 Silhouette., then 5.4 and 5.5. The 5.2 load did strange things; not sure if the chronograph was glitching, but I tossed those results and moved on.
These results were with a Sig P365 with a 3.1″ barrel, 124 grain Nuke. Brass was once-fired CBC (didn’t like it, won’t use again) and CCI 500 primers:
5.4 silhouette @ 1.065 COAL gave me an average of 1049 fps (7 shots), with an extreme spread of 29fps and standard deviation of 8fps.
5.5 Silhouette @ 1.065 COAL gave an average of 1052fps (8 shots), extreme spread of 17fps and standard deviation of 6fps .
Unfortunately, testing got cut short – work beckoned – so I had to pack up and call it a day, but so far this looks like a fantastic load range for a short barrel carry pistol.
The standard disclaimer applies: I am not specifically recommending -anyone- base their loads off of my data, such as it is; I am simply reporting on my particular results in my particular firearm. Use best practices, always, when working up a load.
-BFS
Remember that the length of a hollow point bullet is less than a full nose fmj bullet of the same grain weight. If you measured the COL or OAL of a factory hollow point, you’ll normally find that the length of the cartridge is shorter than a standard fmj. A heavier bullet, however, will raise the OAL due the bullet length that accounts for the extra weight. My RMR fmj 115 gr rounds measure in at 1.15 and I’ve never had issues with my P365’s. The OAL of my RMR Nuke 115gr is 1.09 and, again, No issues yet with feed. If they pass the plunk test, I like the cartridge as long as possible. I am not an expert and I won’t say how long I’ve been reloading, but I wouldn’t be posting anything on any sight that would be dangerous to anyone. All I know is what works for me in my guns and to take anything I say, or anyone else for that matter, as information to be assessed by the reader. The only reason I posted anything on these new bullets is because there is no information available and after I purchased them, I set out to test for myself and report my personal findings to help someone find a starting point.
The bullet caliber mics at .355 and the bullet length mics at .511. The cartridge OAL that works for my P365 is 1.09 which is the recommended OAL in an old Lyman Handgun for Hornady JHP and works fine. I have gone down to 1.085, but then the fps raises enough where I know there is a pressure spike and rather than reduce the powder grain, I just left it at 1.09. I recently did a water jug test and I got a perfect “nuke” like in RMR’s picture in the 1050 fps range. Hope this helps!!
I went out and did some shooting and reloading the last couple of weekends to try and get some data on the new RMR Nukes with CFE Pistol powder ( I bought several pounds during the great powder/primer shortage of 2020-2022):
Pistol: P365
Bullet: RMR Nuke 115gr.
Powder: CFE Pistol
Brass: Mixed
Primer: WSP (Winchester Small Pistol)
OAL: 1.085 1.090 1.093 1.150
Grain: 5.8 5.8 5.8 5.7
Average fps: 1111 1068 1069 1043
Dillon 550 B Press
The reason for the OAL differences is that I wanted to see if there were any feeding issues in the P365, and I had no issues with any charges or lengths within this range. I did some 5.8 gr charges at 1.085 OAL and some shots went up to 1135fps and that seems a little too hot. Oddly, if the OAL was 1.093, the 5.8gr fps rose to 1069.
In the future I may be doing load work with Bullseye, Winchester231 and maybe Unique. Powder and primers are still hard to come by!
RMR MPR 124gr 9mm
Glock 17 Gen4
CCI-500
OAL=1.070” (I have since switched to 1.050” for expanded compatibility with other guns)
CFE-Pistol
5-shot groups
Grains of Powder, Ave FPS, SD
4.2, 946, 15.5
4.4, 1003, 30.4
4.6, 1016, 13.7
4.8, 1053, 26.0
5.1, 1124, 16.1
5.3, 1154, 8.1
5.5, 1179, 17.6
I have loaded and shot many thousands of rounds using this formula and 5.1gr of CFE-Pistol in Glock 17 Gen4, Glock 19 Gen3, and Sig P365xl.
Winchester 231
10-shot groups
Grains of Powder, Ave FPS, SD
4.7, 1159, 8.3
4.8, 1187, 14.1
4.9, 1194, 7.9
