The one thing that I don't like about the 930 is if you accidently bang/depress the bolt/mag release it will dump 2 shells on the lifter jamming it pretty good. I know the solution is NOT to hit it, but if it can happen it probably will.
GC
I had to test this out for myself this morning and it's true, with a full tube empty elevator it will dump 1.3 rounds onto the elevator effectively causing a catastrophic failure.
Very interesting. As a side note, I've never hit the bolt release accidentally during competition either by crawling, running, or barricade shooting. It is something I will watch for though.
I have both a pump and a semi and considerable time on both (A 590A1 SPX a 930 SPX, granted, it's not an 870, but it is where my experience lies)
The 590 being pump, will cycle as fast as you can cycle and pretty much everything as it is under "muscle power"
What the 930 has over the 590 (or any pump for that matter) is matched reliability. Initially, there were some FTE's, but after some research, it needed to be broken in with 3" magnum slugs. Since then, there have been no FTE's on Walmart #4's to Federal #7.5's. Absolutely none (this shooting alongside Benelli's and Remington 1187's that did)
Forged aluminum receiver means lighter weight means faster handling. With the 18.5" barrel, it feels shorter than it is. It very well balanced and quite lively.
Gas operated means lower recoil for faster follow-up shots. There is no comparison in this field.
The 930 trigger pull is sublime compared to anything offered by the 590 or the 870. It is light and crisp. Couple this with the low recoil and your follow up shots are even faster.
To be fair, in a pinch, you can get the 7x 2 3/4" rounds into the gun (6 in the tube, +1 in the pipe) with practice, you can ghost load decently fast with 8 rounds (6 in the tube, +1 on the tray, +1 in the pipe) I have covered this in another thread and it is fully legal as it will only hold 5x 3" shells in the tube.
I still like the 930 pro's versus the cons against the pump despite being down one or two rounds because I love my 930 and I trust it absolutely