[twoodruff78]

Cartridge: 9mm Luger
Bullet: RMR 124gr MPR
Primer: CCI-500
Case: Mixed
Powder: Winchester 231
COAL: 1.091″
Springfield Hellcat Chrono Data (3″ barrel):
Ambient Temp. 78F
Charge Wt. – Measured Velocity
4.5 – 1068 fps
4.8 – 1111 fps
5.0 – 1131 fps
5.2 – 1155 fps
5.4 – 1188 fps

Caution: These loads are hot in my gun. I have settled on the 5.0 gr. load for my personal use. I have not seen any pressure warning signs in my gun, but for reference, my +P Federal 124gr factory ammo measured 1030fps out of my CM9 (different gun, looser chamber, same barrel length).

• This reply was modified 3 years, 4 months ago by twoodruff78.

[twoodruff78]

Bullet: RMR 124gr RNFMJ
Primer: CCI-500
Case: Mixed
Powder: Winchester 231
COAL: 1.150″
Kahr CM-9 Chrono Data (3″ barrel):
Ambient Temp. 72F
Charge Wt. Measured Velocity
4.2 903 fps
4.4 950 fps
4.6 981 fps
4.8 1008 fps
5 1041 fps (hot load)

Springfield Hellcat Chrono Data (3″ barrel):
Ambient Temp. 78F
Charge Wt. Measured Velocity
5.0 1126 fps (hot load)

Caution: The 5.0 gr. load is hot but reliable in two specific guns I’ve tested them in. I have not seen any pressure warning signs in my guns, but for reference, my +P Federal 124gr factory ammo measured 1030fps out of my CM9.

Note: The Hellcat seems to have a tighter chamber than the CM-9. That plus the slightly warmer conditions might possibly explain the higher velocity.

• This reply was modified 3 years, 4 months ago by twoodruff78.

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