9mm Sport Pistol Light Load Data

[Blockader]

There wasn't much info out there on light loads (i.e. for 3-gun, steel challenge) with Alliant SP for my bullet weight so I figured I'd stick some data up for future generations. Caution: note the fairly short OAL.

 

ProChrono Digital, 10 ft distance

55 degrees - overcast

 

124 grain Everglades Plated RN

1.10" OAL

CCI Small Pistol

Mixed Brass

CZ TSO 5.23" barrel with 11# recoil spring

 

3.2 gr

AVG VEL= 906 fps

AVG PF=112

ES=47

SD=11

Extremely soft (like .22), Dirty Cases, 3 ft. ejection distance

 

3.3 gr

AVG VEL=942 fps

AVG PF=116

ES=33

SD=9

Soft, Slightly Cleaner Cases, 3-4 ft ejection distance

 

3.4 gr

AVG VEL=973

AVG PF=120

ES=20

SD=5

Soft but clearly 9mm, clean cases, 4-5 ft ejection distance

 

3.6gr

AVG VEL=1013

AVG PF=125

ES=21

SD=7

Softish, clean cases, 5-6 ft ejection distance

 

3.8

AVG VEL=1037

AVG PF=128

ES=23

SD=8

Standard 9mm recoil (needs heavier spring), dirtier cases?, 7ft ejection distance

 

I think 3.4 gr is clearly the minimum charge at 1.10" OAL, though the 3.2 could work for steel challenge if you don't mind foregoing the clean burning aspect of SP. I went back and did the 3.3 gr string due to the big 67 fps jump between 3.2 and 3.4 to see if the TSO chamber was getting a decent seal there. Hope this helps somebody at some point!

 

[rowdyb]

For a 125 coated I use 3.8 Sport Pistol to get me 130pf out of my Shadow 2. For Steel Challenge I've just dropped a 115 on it and left it as is.

[Blockader]

Oops, I also ran the 3.4 grains load through my PCC with 16" New Frontier barrel. It averaged 1113 fps and 138 pf. 

[SteelCityShooter]

Extrapolating your data a bit: 

 

M&P 2.0 5", Blue 125 gr RN coated,  Magnetospeed at 0',

4.0 gr Sport Pistol

 

1066 fps    PF= 133

 

16" Ruger PC Carbine, same load and chrono,

 

1191 fps    PF= 149

 

Edited December 31, 2018 by SteelCityShooter