I have loaded many thousands of hand gun rounds, but I have no experience loading for rifles. Is there a generally favored powder for 223 rounds? I will be using once fired brass (223 not 5.56) on a Dillon 550b, using 55 grain FMJ. Thanks.
Lots and lots of good powders for the 223/5.56. Loading on your Dillon you might want to go with a easy metering ball/spherical powder. I have good luck with AA 2230/X-Terminater and Win 748 for lighter bullets, for medium to heavy bullets I like TAC and AA 2520.
Thanks for all of the suggestions. Looking at the product discriptions of all of them they all seem to be well suited. I will order a pound of 2 or 3 of them and test them out. (Provided someone gets some powder and primers in stock)
I use H335 with 55 grain FMJ bullets. Fine granulation and meters well thru what ever I use. Got my first load data from American Rifleman and never switched. Don't be like me and over-crimp and have to re-do them.