I have had my 11-87P for 2+ years now and haven't had any reliability issues when using proper ammo. I have run Fed tactical stuff through it without any problems. I mainly shoot the Federal wal mart stuff (1 1/8th oz of shot 3 dram) or my handloads that are 1 oz. of shot in a 3+ dram power level.
The only time I had a problem was when I tired some Remington reduced recoil slugs. The hulls wouldn't even eject out of the gun they were so weak.