Learn to use it correctly. I have a 800B from the middle 70's. Clean the case holders. You have to use the correct wad or power piston, in the cases you are reloading. Proper star for starting crimp, Different cases by different manufacture generally require different powder pistons. There is several reloading manual out the to acheive the correct powder bushing. That's a must! Study the reloading info out there and download them too.
I load for 28, 20 and 12 gauge 2 3/4" cases. I now have 3-800B presses presently. Looking to set up and reload 3" 410's, and 10 gauge case too.
Pet load was for my 12gauge is 1-3/8oz shot load and about 35grs of blue dot 1300fps. I would only vary the shot size from 7.5 to 5's. Depending on what I was hunting. Most of the shots were from a 24" improved barrel. or as needed a 34" Trap barrel for my 870. Steel shot came into requirement in duck hunting. I stop hunting Duck and geese after that. Didn't like the steel shot, and still don't.
Love dove hunting with my 12ga. The shooter would use 7/8 to 1 oz loads and go to sky busting. My 24 IPC would reach 50yds with 1-3/8oz load. As the sky buster would try out farther and reach what I was shooting. I would put on my 34" barrel and extend my range. It was fun to watch the low base shooter try and reach out farther.