.40
S&W: Universal Powder
Disclaimer: All of the following loadings
were taken either from gun powder reloading manuals or other reloading manuals
that may vary in powder charges greatly. Various components combined, make all
the difference in the world. I am not responsible for your actions. Always
refer to official reloading manuals when reloading. As usual, I must say that
this information is what works for me. Use your own common sense. You are
responsible for your own actions!
I used a Steyr M40
with a standard 4" barrel.
180 grain West Coast Copper flat point
bullets; Winchester primers; mixed brass; 1.130 OAL.
Hodgdon Universal Powder; The
following charges are within limits of the official Hodgdon
Reloading Manual.
|
Grains
|
High Vel.
|
Low Vel.
|
Extr. Sprd.
|
Avg. Vel.
|
Std. Dev.
|
Avg. P.F.
|
Max. Brass Diameter Exp.
|
|
5.0
|
955
|
901
|
54
|
928
|
15
|
167
|
0.428
|
|
5.2
|
1002
|
945
|
56
|
987
|
17
|
177
|
0.4285
|
|
5.4
|
1015
|
971
|
43
|
996
|
14
|
179
|
0.429
|
|
5.6
|
1030
|
993
|
36
|
1016
|
10
|
182
|
0.429
|
|
5.8
|
1056
|
1027
|
29
|
1045
|
8
|
188
|
0.4295
|
Note: As you know, chronograph readings are
affected by weather conditions. For this round of testing, the temperature was around
60 degrees and it was a cloudy day.
The new USPSA/IPSC Major Power Factor has
been lowered to 165, which it makes it a little safer to make major with 180
grain and lighter bullets now.
Version 02/11/01 from Pete's 357 SIG Caliber Page