I've heard the Winchester brass is a little better (quality wise) than the R-P.
You've heard wrong, IME
The WW brass I've used in multiple chamberings over the last few years has been crap, while RP has remained decent.
Same here. R-P is perfectly servicable. The Win has been poorly annealed, failing in 1-2 firings in standard chamberings. Also, there multiple flaws cases. weirld lines in the brass itself, off centered flash holes, and large flash hole burrs.
