Thread: 25x45 or 25/223
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  #22  
Old 10-07-2010, 10:07 PM
320pf 320pf is offline
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Join Date: Jun 2006
Posts: 304
Benchmark

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


Quote:
Originally Posted by 320pf View Post
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
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