ORIGINAL: SwampCollie
I had a Winchester 70 in 243 WSSM.
I was pretty disappointed. The rifle would only feed every other round from the magazine. The bolt acctually went right over the case and failed to catch it. The accuracy was alright, the recoil I thought was a touch less than a standard .243. There weren't as many factory offerings as there were/are for a .243 win. I sold the gun since it really didn't tickle me as pink as I would have hoped. If I had it to do again I would have bought the regular .243.
Must be a Winchester problem then, my A-bolt has had zero feeding problems. I used factory and reloads and no probs. As for high velocity bullets--Brownings WSSM's have cromed lined barrels so it shouldnt be as much of an issue. I cant speak for the Winchesters, never had one never will, they just dont have the feel I like.
The 223Wssm and 243Wssm casings are easy to get if you dont mind ordering off the net. Grafs.com has them for 20$ for 100(federal brand)
If you are not a reloader I think I would most likely go with the 22-250 just for the choice of factory loads you can get. If you reload then the xtra capacity the 220swift and Wssm are the way to go. Just my 2cents.