Don't have any experience with the Puma Legacy in .480 but I do have some with mine which is chambered in .357 Magnum.
I purchased it to match my pair of Beretta Stampedes in .357 for cowboy shooting. It's a handy little carbine, with very little perceptible recoil in .357, and quite fun to shoot. The fit on the furniture is okay, and mine came with a John Wayne style large-loop lever.
However, mine had failure to eject problems from the beginning. Not failure to extract or feed, just ejection. Took it to a gunsmith and he cleaned some burrs off the extractor, which fixed it except it ejects all but the last round. He's ordering a new extractor for it, and while he had it we snipped a little of the magazine spring so I could fit ten .38s in there.
Even with the repairs my investment isn't going to be much over $500, so I still feel ahead of the game. I'll have a nice functioning carbine to play with until I can budget for that gorgeous 1873 with the 20" octagonal barrel from Navy Arms that's caught my eye.
Not really what you were asking, but hopefully some of it was helpful.
