Outside lubed uncoated lead at 1050 fps. And It's not going to work very long in a reliable self loading manner, with about 99% semi auto rimfire rifles/pistols IMHO. Same story with otherwise very accurate SK Rifle Match too.
SK Pistol Match (Special) loaded to a slightly higher velocity. It's designed to be more reliable in semi auto match pistols.
my 2 bits
Edit: I have absolutely no doubt that Eley red box or black box would outshoot most these other choices. But neither of them are designed for anything other than match bolt action rifles and match single shot pistols.
And Eley of this quality, will cost mucho pesos compared to most SK.
I reliably shot 250 rounds of SK standard and Rifle match through my Remington 597. The OP is just looking to see if some accurate groups can be shot with his rifle, not run 1000+ rounds flawlessly without cleaning. If it came down to it, OP could single load the rifle so that he doesn't have to worry about cycling issues, but that would be a pain in the butt. Eley is good ammo, but individual rifle preference trumps this factor and I typically see Lapua giving me the best performance. Haven't had a rifle that preferred Eley yet.