Anyone loading RMR 124 gr Nuke to +P or +P+?

I haven’t tried the 124’s but have loaded the 115 nukes at the higher end of the scale and they work exceptionally well.

124HP RMR
8.5 grains of Accurate #7 is as hot as I went. My Springfield Hellcat 3.1″ barrel pushed 1209fps ES29 SD12, kinda on the +p side. And With 8.0 grains 1149fps ES17 SD6.

124HP RMR
5.7 grains Autocomp 1149fps ES13 SD5.
That was with the same Springfield Hellcat with 3.1″ barrel. I did go hotter but the SD’s just got to crazy with the Autocomp.

124HP RMR
6.0 grains of CFE Pistol, same Springfield Hellcat 3.1″ barrel, 1197fps ES39 SD15. Any hotter was just a waste, bullet spread just got too crazy.

124HP RMR
6.0 grains of Ramshot Silouette, Same Springfield Hellcat 3.1″ barrel, 1151fps ES27 SD11.

124HP RMR
5.4 grains of Ramshot Zip, Same Springfield Hellcat 3.1″ Barrel, 1151fps ES36 SD13.

Those are the only powders so far that I used RMR’s 9m 124HP’s that were a little on the hot side. I have done other barrel lenths that are 4″, 4.5″, and 5.2″. I listed the short barrel 3.1″ Hellcat to show that reaching the 1150fps minimum recommendation in a short barrel pistol is possible! But to continue using those rounds as practice rounds, probably not. With the Springfield Hellcat, That 8.5 grain Accurate #7 was throwing brass 3 lanes over.

In my Canik 5.2 barrel pistol, 8.5 grains of Accurate #7 was 1359fps.

Wish I could tell you yes, but it wouldn’t be true.
So far I have only chronographed.

You do know that there is no such thing as +P+ according to SAMMI.

6.4 of Win572 1.25 OAL out of a 3.8 barrel, Hellcat RDP with a 20 pound spring, NEW RMI cases
low 1272 high 1286. occasionally 1250 1260. I think due to plus or minus .1 error rate of scale.

5.8 Barrel in a G34 KKM
1354 1381 using 24 pound spring and a shell shock case. Those cases will add 10 to 20fps over a brass case. Guns are worked hard at these speeds

Primers and head expansion good. Dont do this unless you understand the powder and have good case coverage. I would not use a once fired case. Always start low and work up, what works for one gun may not work in another. You’ll get a strong push, both guns are compensated and still using heavy springs. I would not in anything 3.5 or lower barrel.
Understand Winchester 572 powder, research the competition guys who have tried it out. Is OAL sensitive and temperature sensitive. Higher FPS lower temps.
To add, both barrels were throat reamed to accept that OAL, Nuke is a fat bullet, dont load this amount at shorter lengths.

• This reply was modified 7 months ago by Scotty Luther.

Brian,”
“My current+p loads with the 124 nuke is 5.5gr of N340 @1200fps. Shoots great”
Any COL for this load?