These aren't .303 Enfields. They're the Ishapore Arsenal Enfield chambered for 7.62 NATO. While they're unmistakeably SMLE's, they're chambered for a common military cartridge and have no problem digesting commercial .308 ammo.
Enfeild purists turn their noses up at 'em for some reason.
I don't care. They're darn fine shooters for the money. I 'sporterized' one and put the other two away for a rainy day...
L
Personally, I wouldn't fire a modern high pressure round like the 7.62 NATO in a rechambered WWI vintage Smellie if you gave me a truckload of them, and believe it or not there are some of those out there. I value my eyes and fingers too much for that. I had an old model '95 Mauser blow a primer on me a few years ago at the range with new commercial 6.5x55 ammo, and the cocking piece blew back and whacked my right thumb like a jackhammer. It almost broke the bone, and my entire thumb turned black and was swollen to the diameter of a lemon for a week or so afterward. After that somewhat less than pleasurable experience I'm now very careful about what I load into any old gun that has had a rough life in the military.