Thanks for the explanation for why it's likely mix-matched. I chuckled at the Johnny Cash reference!

It's a little disheartening to learn this is likely why it's in the condition it's in, but I just need to remind myself I didn't buy it to be a museum piece! Hopefully the $800 I spent in total on this and the SMLE No. 1 Mk III* puts me somewhere in the ballpark of a reasonable purchase. I'll have to get that one cleaned up and posted here soon. I've put it off because it's covered in cosmolineicon.

Based on what I found while cleaning, I'd say the rifle has been shot before so hopefully it's still safe to do so. I'll have to see if there's a local gunsmith knowledgeable on the Lee Enfields that can check it out. I've otherwise had a hell of a time finding the gauges here in the U.S. I've found a few (expensive) ones, but they are SAAMI spec and what I've read leads me to believe I need those made to Britishicon "military spec."

Does anybody have any leads on some gauges?