you can rechamber the bbl, but it will leave a portion of the .303 chamber making the empties come out with 2 shoulders. not really a problem if you aren't going to reload.
Somewhere on one of the 5 or 6 sites I saw a link for rechambering Bren barrels and I can't seem to find it now. Any one?
Welcome, Barrelxchange! I bought a .40 Uzi barrel from him a few years ago. Nice stuff!
Gunco Member #10
The "original" Boltcutter Rivet Squeezers:
Project Pink - the Pink and Blue AK-74: