I use 90gr in a cva optima. Measured by volume not weight. I got little tubes made by the BH209 people for measuring and carrying an extra charge for hunting.

For primers, I use standard Winchester 209’s.

For bullets, I go with Barnes 290gr TEZ, but they’re impossible to find now since I think all of Barnes stuff disappeared once Remington went under.

As far as cleaning goes, you can get away with just about no cleaning (not recommended, but I’ve had minimal effects with doing none). For three years, I shot my gun 10 times, left it in the safe for about a year (charged minus primer), then would still hit the bullseye on first shot of the season. I finally started noticing some corrosion last month and finally gave it a cleaning. It wasn’t that bad and It never effected accuracy (I just tagged two coyotes with two shots at 175yds using it)