You don't say wether your shooting open or limited. If your shooting open spray your comp before each practice session and match with Weld-All , no lead buildup.
I've put thousands of rds. thru my Benelli for the last 5yrs. with never a problem. That includes a number of makes of shells and everything from #4 shot to Wal Mart #8's.At least 3 different brands of 7/8 to 1.25 oz. slugs.