[320pf]

I had a chance to try a new powder today before is got too dark for the chrongrapah.

Load Data: (standard disclaimer as with any wild-cat, use at own risk and work up slow)

100 gr Speer SPBT (16 inch 1:10 twist barrel) seated to 2.255 COL. (16 inch 1:10 twist barrel)
Charge Hodgdon Benchmark
wt.(g)–––vel. (fps)
23.8––––2364
24.5––––2411
25.1––––2494 small velocity deviation +/- 5 fps for 3 shot string
25.5––––2518 small velocity deviation +/- 2 fps for 3 shot string

Benchmark does not necessarily give the maximum velocities, but the velocity increase with charge increase is very well correlated with this powder.

320pf

Originally Posted by 320pf

Here are some more load data for the 25-223AR (6.35x43mm)

Load Data: (standard disclaimer as with any wild-cat, use at own risk and work up slow)

75g Hornaday VMAX seated to 2.255 COL. (16 inch 1:10 twist barrel)
Charge Reloader-7
wt.(g)–––vel. (fps)
25.0––––2890
25.5––––2940
26.0––––3000
26.5––––3016––-velocity curve flattening out...Over Max load??
27.0––––3079 OVER MAX

I hope this helps

320pf