I know what you mean about cleaning. I still get fooled by viewing the porting from the breech, I am scrubbing hell out of the barrel until I realise, it is actually the porting I am seeing and NOT crud !I had a Beretta 687 sporter ported by GunMark in the 1980s .. they offered a porting and long forcing cone conversion when these things were a fad . A bugger to clean and to be fair made no difference whatsoever, but I’ve always been a tinkerer
