.62 cal renegade project

[camellips]

I know this may not be the best place to ask this question but there are a lot of knowledgeable gun builders on this forum that may be able to help me.

I am converting my .54 cal Renegade into a .62 cal. I got the barrel from long hammock and my percussion plug in from Track of the Wolf.

Question is how do I fit this so it is flush with the breech and lines up with the flats? Do I take some off of the barrel? or the Plug?

I photo below shows the original factory barrel and the new barrel with the plug screwed in as far as it would go. Using a set of automotive feeler gauges the gap measures .021 " of a inch.

[dans]

I believe that the plugs are threaded long so they can be custom fit. Go slow and screw it back in the barrel often until it is perfect.

[swampman]

There is a gunsmithing section on the Traditional Muzzleloading forum. They would be a lot of help.