I am a new member and have a new build-up AR 1-7 T w/20", 1" dia SS barrel that I plan to use the CFE-223 powder, if I can get a good starting load. Does anyone have any suggestions ??? Sierra doesn't have any up to date data for the AR and directed me to Hodgeon Powder Co. I will call them ASAP, but have been unable to retrieve anything off there load data site.
As you know, there is a difference in lengths of the Military 5.56 and Commercial 223 case necks, the latter being the shorter. Loadings used between the two can translate to large pressure differences and can be unsafe (explode) in some rifle chambers, as has occurred in FL. This, possibly could be from internal chamber heat, barrel heat, or direct sun on ammo/ rifle, but there is no doubt regards case and chamber lengths. So be very careful.
As you know, there is a difference in lengths of the Military 5.56 and Commercial 223 case necks, the latter being the shorter. Loadings used between the two can translate to large pressure differences and can be unsafe (explode) in some rifle chambers, as has occurred in FL. This, possibly could be from internal chamber heat, barrel heat, or direct sun on ammo/ rifle, but there is no doubt regards case and chamber lengths. So be very careful.
