Remington handgun brass seems to be better for strength than their rifle brass. I can load R-P .45 ACP until I lose it, but I only get about 10-12 loadings from their .220 Swift brass. I don't push the Swift to the limit, but they are loaded to (ave over chrono)) 3875 with a 55 gr sp. for prarie dogs. A sod poodle doesn't know the difference between 3800 and 4100 fps. They still go SPLAT !