The SMLE's that are .308 are late model guns with alloy steel, early guns are too soft. Stick with .303, it feeds much better than .308 anyway.

Hi, I saw an advert for SMLE's in 308win today - can't remember if it as a MkIII or MkIV rifle, but I thought SMLE's, because they are rear locking, weren't suitable for 'modern' cartridges? If it could handle a 308, what else could it take?

I have an Ishapore 2-A Enfield in .308.
IIRC is was imported by Navy Arms.
It came covered in cosmolene.
The Ishapore is made in India.
I have a Catco steel scope mount on it and it is accurate with Bulgarian steel cased 308 ammo.

I went through a stress analysis on the Enfield bolt body, and consistant with the "stretchy action" mythology, the bolt with lug in the rear compresses and makes a stretching stress on the brass.