I like VV N-550 but 2000 MR has value
I have a cartridge I call the .224 Nisqually. It has the same volume as the Swift and Swift data is interchangeable with the Nisqually. The Nisqually has a 40 degree shoulder, not "semi-rimmed" and I have both large and small rifle primer pockets available because I can use 6.5X47 Lapua brass or shortened .22-250 cases.
Anyway, I have worn out one Nisqually barrel and I am protecting the 10 twist one on it now. I nitrocarburize all barrels and HBN coat the bullets. No naked bullets!
VV N-550 worked well for me with 55gr B-tips on one ground squirrel expedition. The down side is that N-550, with the extra Nitro-gylcerine, is a flame thrower. Now I use 2000MR which is made to burn at a much cooler temperature. It has the same NitroChem Swiss designer that brought us Reloader 17 so it has some zoom.