RMR 124 gr.HP MPR / RMR 124 HP Nuke

[Joseph Rietdorf]

You should be safe using any same weight bullet\’s recipes other than plated and cast lead bullets. I\’m trying out the 124 gr NUKEs for the 1st time when I get them. I\’ll primarily be using them in 9mm PCCs and my MP-5 Clone. Hollow points are harder to feed in unramped barrels which most 9mm PCCs are (unramped), accept for my CZ Scorpion which eats anything I feed it.

[MonkeyMan20171]

I just love these bullets.

I used the Lyman 51\’st Edition / Sierra 124 JHP for my starting loads. In that I am using Winchester 244 somewhat complicated the process because it is such a new powder not much is published. I am using W244 simply because it is available in my area and nothing else like W231 or Unique is.

Bottom line -> I used my Chronograph (Competition Electronics) to zero in on a velocity of approximately 1150 fps. I am using Sterling brass (once to three times reloaded), RCBS carbide dies, CCI small pistol primers and 4.8 grains of W244 with an COAL of 1.08 in. I do not impart any significant crimp on the finished bullet – just a very light taper crimp as provided by the die.

Shooting these out of my M&P with a 4.25 in barrel, 1:10 twist I achieve a very consistent mean velocity of 1128 fps with a standard deviations
ranging from 7 to 10 fps.

Again – this is using STERLING brass. I feel that this brass is a lot stronger than say Blazer or other similar \”soft brass\” cartridges. If I switch brass I will have to adjust my powder drop. Softer brass with require more powder due to loss of crimp strength.

One thing that I have noted is that as I push the bullets to higher and higher velocities, the standard deviation in velocity goes to hell. For myself and my firearms (M&P / Dagger) – the above velocity is my sweet spot.

[Daniel Teebken]

I have been reloading the 115gr & 124 Nukes. The bullets are chubby so have to load short to chamber in my old S&W 469. Do a plunk test on the gun to check the OAL.
1st load
Powder #2 4.4 gr
OAL 1.050
Avg 1093 Hi 1097 Lo 1089 Es 8 Sd 3.
No pressure signs, and run well.
2nd load
124 gr Nukes
Powder #2 4.1gr
OAL 1.050
Avg 1032 Hi 1042 Lo 1022 Es 20 Sd 7.

[MSwickard]

Finally loaded up the 124 gr Nukes. I tested the loads in the following pistols:

Gen 4 Glock 26
Gen 4 Glock 19
Gen 5 Glock 45
Sig P226 Navy

due to the various chambers, loads were loaded to an OAL of 1.060\”. Brass used was mixed. Primer used was Federal SP mag. Powder was Silhouette.

Powder charges:
5.5 gr
5,7 gr
6.0 gr

Velocity ranges for each pistol:

G26 1109-1176 fps
G19 1148-1222 fps
G45 1114-1187 fps
P226 1129-1189 fps

Best loads are the 5.7 and 6.0, but still need to do further accuracy testing

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