I had one of the "first", blued and longer barrel, very dense pattern RIGHT OUT OF THE MUZZLE and probably very fatal RIGHT OUT OF THE MUZZLE. The shot pattern strung in recoil or just really didn't open up concentric either past about 10yds BUT it was a car gun for getting caught in a drivethrough or atm so I was okay with that. with buckshot it put a nice tight triangle about 1'' wide at 15yds, 3'' at 25yds though. I didn't handload back then so I couldn't work up accurate loads for it with 45 colt, with factory ammo it wasn't worth using past 15yds, not good past 5-10 maybe. They have centerfire for power (can't take hot ammo though, so not MUCH power), shot for versatility/novelty/limited penetration. I like them but wanted more accuracy, and power, got a blackhawk.
Got the blackhawk fitted with hogue grips to stop the hand bruising, busted lots of watermelons and canteloupes with buffalo bore nastiness, decided it was too expensive and painful to continue doing so when I could use a 12ga to do the same but cheaper and less painful, sold the blackhawk.
Got a taurus .357 for tearing stuff up, cheaper to shoot, BETTER ACCURACY, etcetera.
Got tired of the taurus, not the most accurate, bore was ugly, trigger wasn't great- all serviceable but not "quality".
Got a Governor, shoots much better due to better grip and trigger, tighter cylinder, better bore, looks good, better carrying, more recoil though. Shoots a pattern not as dense but uniform and consistent to 15yds, almost a perfect circle with birdshot. Shoots good with buckshot to 15yds, not clean but enough to stay on a chest. PDX1 discs and pellets; pellets in a doughnut and erratic (12'' at 12yds), discs centered up in a 4'' group at 12yds, tears stuff to shreads. .45 acp actually shoots 6'' at 25yds seated (with handloads), though I am rarely able to get that standing. .45 colt was no more accurate surprisingly, and with plus p loads is still weak. the chamber is a bit loose for 45 lc (acp is supported well by the moons) and the barrel is slightly overbore (run a borebrush through and see if it doesn't almost fall through) so no gain in power (if a round is "hot" it'll just crack the unsupported brass, once the bullet leaves the case it'll lose that pressure quick enough to negate the extra power from lc vs acp). I never did try to shoot factory .410 slugs and I don't handload .410 either so no info on that one. you'll notice the sights are set up for quick and personal shooting. try speed drills up close on boards, handthrown clays and such, you'll like it. it does all that well. as for the accuracy bump (other than being a higher quality gun) I've read that the shorter barrels spin the shot cup less and it's not enough momentum to ruin the pattern....
I'm not a physicist so whatever, sounds good?
Got a gp-100, did a trigger job, shoots good, good to go.... on accuracy and power, not quite as fun though!
that's my take, slick up a gp-100 and get a bunch of moons loaded up plus speed strips of 410 for a governor. if you need weight and stainless steel for toughness/corrosion resistance though, you HAVE to go taurus unless you have $1200 or so for freedom arms/ T/C / magnum research