I started with a Benelli M2 which runs like a sewing machine. Any ammo, virtually no cleaning, some lube, 3 day multigun conditions, and it just ran and ran. My pistol and rifle run great as well but I am extremely familiar with their upkeep cycles.
The MKA 1919 match is my first mag fed shotgun but it seems so finicky. So far it has 1400 rounds through it. Various T&N parts. Stock recoil spring (Reduced recoil spring seemed to drag when stripping rounds from the mag). Mid barrel comp. Light load ring thing. 10rd factory mags. I tear it down every 200-300 rounds for a good cleaning.
Today I was running a practice stage with Rio 1 1/8, 7.5, 1280fps ammo and during the 21 round COF 1 shell would always fail to eject. Stove pipe with bolt forward. I could rip the case out of the port and continue but I want this gun to run right.
Clean more often? Boooooo.
Lube more? Where?
Ammo? 1290 AA's run great but I cant afford to practice with them. Large matches only.
Just to be expected with this gun?
TIA for the help.