Barrel bulge

[A.baird7]

I’ve got a CVa optima v2 that I got about 50 rounds through and just noticed it has a barrel bulge about 4 inches from the end of the barrel. My question is should I start looking for a new muzzy or just send it with this one? It’s still shooting pretty good out to 200

 

[ElDiablito]

Bulge? Can you see or measure a bulge on the outside?

 

[Pickettpuncher]

Are you sure that ain’t the recess to get the sabot started for easier loading. I don’t remember that part having rifling tho, and not that deep.