835 is chambered for up to 3 1/2" shells, has dual slides, cannot fire slugs out of a ported barrel, comes in various configurations as far as barrel length.....
found this on another site, I just copied and pasted.....
Some aspects of the 535 compared to the 835. The 535 has:
Smaller pump/forearm.
Sling mounts to barrel retaining cap and not studded into the barrel under lug ring.
Lighter weight.
Dedicated choke tubes - never understood why the 535 does not use the 500 tubes. (this is actually incorrect - see bsn's post)
Simplistically, the 535 is a beefed-up 500 model (as far a look and feel are concerned) and the 835 is a larger and heavier version. With the 535 having similar handling characteristics to the 500 model, I have found the 535 to be better suited to lots of pass shooting (dove) and the weight of the 835 soaks up the recoil of heavier rounds much better (duck and turkey).
This is my 835. I bought it before I moved back to New Brunswick. I bought it in Edmonton at Wholesale Sports on sale for like $355