I'm currently running my .223 on Benchmark (Nosler or VMax 55grn over 25grns of Benchmark).
Struggling to get Benchmark so thinking of either Ramshot TAC (can get locally) or a Vhit powder or 1kg tubs to keep me going longer. The Vhit route is confusing as I know N133 is a favourite for .223 but the Nosler manual only lists N135 or N120. Dubious of N120 as I think it's a bit fast for my 1-9 twist.
what do others use on a fast twist .223, and don't bother suggesting varget as I don't want to be tied down to the powder that has the biggest supply problems.