303 brit was nice on our little 400yard gong last year, just a nice little splatter circle where it had taken the paint off, as opposed to the 30-378wby with 180gr tsx that was punching holes through it like it was paper.
we really were impressed with the old enfield though because my friend was hitting the gong like clockwork with the open sights ramp dialed up to 400
the brit has been putting meat in canadian freezers decade after decade, generation after generation.. you will find it has lots of fans on here.
I find the brit based wildcats quite interesting though I dont have one
but the guys are right, try the search button you will find lots of interesting threads.