I just got some new surplus 7383 I've never heard of these numbers and can't find it listed in any books.
The Data sheet with it says a full 223 case only makes about 2600fps.
That's too darned slow for this cartridge.
It looks like 4831 to me. But, does anyone have a comparison between these two, or else loading charts for other than .223 and 50BMG with this powder??
Thank you,