I know there has been discussion about a favorite and if it can be competetive if rebarreled. Has anyone had any luck with this? I know that they are a slip fit and not threaded and that is an area of question with their accuracy. 
Has anyone out there in singleshot land done this, made one a good shooter?
You have probablly guessed by now that I am thinking about trying it, but would like some input from the masses. The gun I have is tight and has a nice let off but the chamber is sloppy and the extractor hammered over. The gun needs a new barrel anyhow.  Green mt makes a 1.06 dia. .22 blank. I can leave it heavey, or thin it up. I am leaning towards heavey. 
What should I look out for?
Merwin

Hey Merwin !!!

My “95” Favorite has been in the family for many years but like so many others, the bore had long been shot-out since Moby Dick was a Guppy !!! 

Sooo, three years ago I found out that the slip-fit Mossberg barrel’s fit in like a “hand in glove”.. Just need to file an extractor slot, grind the notch for the lock screw and D & T for the forestock screw. 

I installed a $10.00 26-inch Accra-Groove barrel and fit a 4-X scope for my old eye’s.. Save the original stuff for the collector’s yarns.

Gotta love them old Favorites !!!

Ed….

Merwin B  I am a retired gunsmith'many years ago a man by the name of Reed Myers wanted to do this very thing. we put a Douglas prem .grade brl. on it 'chambered with my match reamer.He shot a lot' couldnt keep screws' pins or fire pins it .I wound up making every thing out of tool steel and putting a taper pin in the reciever to keep the brl. tight.There used to be a 22 bench  match around Springfield Mo. thatReed shot at' the first time he showed up'they laughedat him' but only the First time. the rifle  beat 52's anchutz'and any thing el se they wanted to shoot.Just use a good brl.'make all pins and screws out of drill rod and pin the brl wont hurt.  Verl

I've used GM bbls for years, both RF and CF, and have no complaints about their accuracy especially for the price. However I'd be absolutely astounded if a GM RF bbl would shoot with a Lilja for instance, or any of the other top RF makers. Some years ago I built 4 Ruger 10/22s with aftermarket bbls; one was a GM and it was very accurate but wouldn't quite shoot with either of the Volquartsens, close but not quite.

For a single shot rifle it's hard to beat the GM light octagon style; I recently turned one down to 1/2 octagon with a wedding band & rib and IMO it looks super.
Good luck, Joe