I have used the powder you listed with the exception of 2520. 2460 was my first "favorite" when I was loading 7mmTCU and 30-30 Win for my Contender. When I got more into the .223 Rem. for varmints, 2015 seemed to be the ticket. But now, I have settled on Ramshot TAC and have burned through 3 of the 8 pound kegs, so far. ( The AR-15's probably have something to do with that). TAC is clean burning, meters fantastic in a powder measure and has provided good velocity and accuracy with bullets from 40 gr up to 77 gr. Some people say it is temperature sensitive, but I haven't noticed any dramatic changes to accuracy or point of aim in temperatures from 30° to 90°+. But then, I don't exceed maximum published loads. I still have a pound or two of 2015 and a pound of 2460 and will probably load some with those, too. But I plan on buying another 8 pounder or two of TAC when I finish off what I have.
