I own 5 pump. 6 SxS, 9 O/U and 3 combo shotguns (mostly 12's and 20's) but about 11 years ago A crash on my bicycle caused me to hang up the larger gauges. My 2 28's and 2 410 took me a year and a half to get up to large bore scores on Sporting Clays. In 2005 I bought a Browning 30" Feather XS in 28 and one in 410. I picked up a 725 about two years ago. I love these guns. The key to hitting anything with 410's is almost simple! Two things really, first: Practice. Second: Use one type of ammo! The different brands are so different in the velocity, you'll never get the hang of it! I Started with Winchester Super-X 3" (1135 fps) and had a little over 2000 shells I bought by the 10 box case and a MEC 600 Jr reloader. After a few years I went to Winchester AA Sporting @ 1300 fps. Honestly, I don't think one is better than the other, BUT they are very different. Don't groan when I say, I'm down to 6 1/2 flats of new shells. I have just about blown the ends off my 3500 2.5" HS hulls. The higher velocity shortens the life by about 50%! I am starting to see new production AA 410's but at $11.50 to $17.50 per 25/box!
At 800 to the 25-pound bag of shot and new Primer and Wad prices they are costing about $3.25 a box to reload. That is still the cheapest game in town!
One of my pleasant memories on the farm was in the cool of the evening walking out to the gardens a whole box of 410 would fit in a pants pocket. I could shoot pests out of the yard and garden without tearing up my shoulder or ears! (3" shells are subsonic).
After several years of exclusively shooting 410 & 28, a few Springs ago I joined a Sporting Clays League. 10 weeks/50 birds a week. I chose to use my wife's 20 gauge 391 Beretta. The first week I had a new personal best 45/50 (90%). For the 10 weeks my team came in first, personally I came in #3 and was the only non 12 gauge. I honestly believe if I had used my 410, I would have come in better overall! (Kind of hard to beat the Master Class shooters on longer shots, but smashing yourself with high recoil shells is counterproductive!)
My normal scores are 75 to 85% on the 12 gauge courses. If I go to a Tournament, I shoot Hunter Class (no prizes) and enjoy breaking birds the big boys miss! But then any day you go shooting is a good day!
Ivan