Browning Silver Barrel larger at muzzel?

[HAMMY65]

I recently purchased a new Browing silver hunter and this morning shot about a 150 rounds through it on the trap feild using a full choke and lead shot size 7-1/2 & 8.

My question is, around where the choke threads into the barrel (2-1/2'' down) to the muzzle, the barrel appears to be about 1/16'' diameter wider than compared to the rest of the barrel. Is this normal? or do I have an issue?

Any help would be appreciated.

Thanks,

 

[Win/64]

I would think that would be to accommodate the Choke.