Gordonsetter,
Thanks for the prompt reply. I just wanted an idea of how much your gun had been shot. IMO, the size shot (#8, #7.5, buckshot, or slugs) has little effect on the operating ability of the gun. Usually, if the gun will shoot one shot size, it will shoot another shot size just as reliably. Different brands of ammo will have much more effect on functional reliability than shot size.
To give you a comparison to a couple of my automatics, I have put about 1500 rounds through a Rem 1100 with no parts breakage and no failures to feed after the first 200 to 300 rounds to break in the gun. I've put about 10,000 rounds through a Beretta 390 with no parts breakage and perhaps 1 failure to feed every 2000 rounds when using the Wally World cheap ammo. BTW, I typically go about 1500 rounds before giving the Beretta a good cleaning.
My shooting volume would be considered as light when compared to moderate or heavy usage by dedicated clay target shooters. There are many automatics that have seen 30K, 50K, and a few that have seen 100K rounds through them.
I'm not trying to disparage the Baikal MP153 in any way. I'm just saying that until you have put 20K, 30K, or more rounds through the gun, then you really haven't put enough rounds through it to compare its durability with the guns that are used the most in competition. In fact, one of the knocks on the Remington 1100 is that it will go ONLY about 30K rounds before you have to start replacing small, inexpensive parts. :?