SMP 842 Powder Data

[ernierod]

I want to reload .223 and use 60gr to 70gr bullets. I have obtained a small quantity of SMP 842 and don't know an awful lot about this powder.Any experienced person out there to offer me some guidence on loading info?? Tnx

 

[jonbearman]

SMP842,What is it supposed to be close too?I have never heard of it.

 

[Terry]

http://www.dtic.mil/ndia/2006smallarms/faintich.pdf

 

[bigedp51]

WARNING!!! WC 842 is NOT the same as CFE 223: Here is why:
http://www.ar15.com/archive/topic.html?b=6&f=42&t=372072

 

[ernierod]

Re: SMP 842 Powder Data-223 (WC 842)

Barrel 16",1:8" twist,Sierra SMK 69gr .223 bullets (#1380),New Federal Brass and WSR primers.Started at 22 grs using SMP-842. In steps of .3grain, increased to 24.4grs carefully looking for any signs of pressure-none found. It became clear,with this particular bbl(Red-X bull) that perhaps a slightly lighter weight bullet,different brand bullet or powder might reliably produce 1" groups or better, at 100yds