I have an SMLE no.1 Mk.III that rattles when fully assembled (Military configuration) and can't hit a three inch grouping at 100 yards worth a damn.

I was thinking about glass bedding the forend and the front handguard. Is this a good idea? Is it possible? Will that help the accuracy?

What else can I do to increase accuracy? The bore is bright, but the chamber is long, expanding about a quarter of an inch on new brass.
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