No experience whatsoever. But the swamped barrel could complicate carving the barrel channel for it. And while the swamped barrel may add weight over a 3/4" .40 barrel, I thought that swamped barrels were primarily intended to lessen the weight verses building with the larger caliber & diameter straight barrels.
I did hear that a shorter GM .40 barrel balanced much better in a half stock than their longer .40 barrel which was more front heavy. But that was probably a larger diameter barrel like a 1". That could have been 32" verses a 36" inch or similar length, and the 32" exhibited pinpoint accuracy at 100 yards. My point is that the extra weight can have an effect on holding comfort. But the barrel style shouldn't affect accuracy if the channel is carved right.
Last edited by arcticap; September 17, 2012 at 12:03 PM.