My friend, shooting Skeet with a pump is like using a pair of pliers on a rusty nut when you have a box wrench in your tool box. It may work; but, you have a better tool for the job. Why are you messing with a pump when you have an O/U? Consider this: Every time you shoot a pump you're delaying your first 75-straight with your O/U.
For many years I shot .410-bore Skeet with a Winchester M-101 in .410. It was a very pretty little gun (the pick-of-the litter woodwise), but I never got a straight with it. One day, after missing something like high-7 for a 24, I was complaining that I just couldn't shoot the gun very well. One of the club's old boys made a comment to the effect that no one shot a M-101 .410 very well. Shortly thereafter, I got a new 12-ga O/U with a tube set. Like magic, I started shooting .410 straights, and the little Winchester was traded away.