sold the rifle, but i never had a problem using 1950s vintage mk-7 .303 ball ammo in my no1 mk3 enfield and even used old tracer rounds without fuss, but you have to be carefull using hot reloads with the enfield's relativly weak rear locking bolt or you may end up wearing the bolt in your face at the worst, or have a case head speration and a face full of hot gas at the least if your unlucky. the latter nearly happened to me once when i was using someone elses reloads. i knew something was wrong as soon as i pulled the trigger on the first round because of the extra hard recoil, it kicked like a cow. the cartridge case had cracked all the way around the circumfrence but luckily for me it didnt seperate. i pulled a few rounds apart and weighed the powder charge and they were way overloaded, found out later that the genuis who loaded the ammo was trying to duplicate 308win ballistics with his .303 loads!
i learned my lesson, never ever use someone elses reloaded ammo.
