picked up an Enfield 2A1 "Carbine"

[Alan de Enfield]

Attachment 129438
I noticed that the bolt on this clean shooter was a little tight .

That is of concern as these rifles barely passed factory proof testing - the bodies can warp if loads hotter than it was designed for are used. It was designed for the old 7.62 M80 50gr round and as many folks seem to think that all 7.62 is the same and that 308 Win is the same as 7.62 the rifle could have easily become overstressed by a previous owner.

If home-loading then use 7.62 cases or if using 303 win cases then download by 1gr. as the case specification is different and the volume on the 308 is greater.