The 6.5x53R is an excellent cartridge, and with a greater versatility in bullet weights compared to the .240 Flanged.

If you want a rimmed .243 wouldn’t a cartridge based on the .303 case be a simpler way to go (I think the Australians have wildcatted it) and I seem to remember a 6mm rimmed being a factory load in Europe.

Last edited by Parabola; 06/21/25 06:10 AM.