The only other option might be having the barrel bored and relined, but there is very little 'meat' at the muzzle end for that kind of thing. If you're determined to shoot it, you could have a decent SMLE barrel machined to the same external configuration and have it fitted by someone with the RIGHT TOOLS to do it without damaging the action or original barrel. However, as others have said, the rifle is a collector's item, not a 'user'. Best left as is and get something later/already 'chopped' if you want a shooter.