Some More .40 S&w Factory Ammo Chrono Data

[revchuck]

Folks - Just FYI - I chronoed three loads from Federal in my 4" Steyr M40. The following are the results of one 10 round string. Data is expressed as average velocity/ES/SD.

155 grain Hi-Shok: 1155/25/8

180 grain Hi-Shok: 962/19/6

165 grain Expanding Full Metal Jacket (EFMJ): 958/28/8

Those single-digit SDs are nice. The EFMJ load is supposed to be a 1100+ fps load, but ended up being way less. The 155 grain load is actually faster than factory specs, while the 180 grain load is 38 fps slower.

I also chronoed a handload with 185 grain Precision bullets and 4.4 grains of Bullseye, using Federal 100 primers, and loaded to 1.13" OAL. Three strings, the only difference is brass:

Federal: 889/27/8

R-P: 883/36/10

Winchester: 892/15/4

IMO, segregating brass by headstamp would be a serious waste of time, at least with my gun.