Wssm cartridges have feeding issues. The original wsm owes its demise to the original creator Rick Jamison and his settlement with Olin over copyright infringement
I don't recall any feeding problems with the 25 WSSM in Winchester/USRA 70s, but I don't feel any great need to cycle manually operated rifles as fast as possible. I can count over 2K rounds of 25 WSSM fired from multiple Winchester/USRA 70s and another couple hundred 223 WSSM and 243 WSSM rounds fired from other Winchester/USRA 70s. .
Agree with 260 Remguy & Muledeer. My M70 243WSSM feeds just fine and shoots quite well too. Bought cheaply so worth a try! In fact I've had more issues with a the 300 WSM in a MRC1999 but thats not the fault of the cartridge but the poor manufacture of the actions at the time. These were the initial production run. They were all over the place! Some good some really bad. I got one of the bad ones.
