Well, Smith & Wesson should be sued for the grips they put on the gun, and in the box. First thing that should be done is the X frames grips for the Smith .500 & .460 should be put on. You can get them from S&W, and that is about the only place. I heard that Brownells has them on backorder. They are Hogue, but, they are a special design too.
That makes the weapon tolerable. You need to have alot of experience in shooting heavy recoiling weapons. This is the ultimate in heavy recoiling weapons.
Only thing I have found worse was a .12 gauge, dbl. barrel shotgun, that we seized in a raid. The barrels were cut to 12 inches, stock was cut to a pistol grip, and the fore end was duct taped to the barrels. It was modified to fire both barrels at the same time. Birdshot was horrible, out of it. Buckshot was insane. And I had to test it before court. Guess the guy closest to retirement, always gets that assignment. Oh, just for arguments sake, we found it loaded with buckshot.
But, back to the 329PD, since retirement, I carry mine everyday. Its loaded with a reasonably warm loaded 240 lasercast semi-wadcutter, over a large dose of 2400 powder, and touched off by a CCI, 350 magnum primer. It flat kicks, but, its a kick to shot, too.
Accuracy is just down right spooky. Nothing weighing that least should shoot that good. As I have said before, this thing will drive nails. Just don't want to drive alot of them, in one session.
Past shooting gloves are not a bad idea either. Do watch it though. It seems prone to kick on the internal lock, during recoil. That ties up the gun. Mine has been disabled. 10 minute job with tools, 20 minutes with rocks.
It is a great carrying gun. It is also a not alot of shooting gun, either. Alot of people run .44 specials in them. I agree, if you don't handload, and are trying to get used to it. If you handload, start off easy and work up, till you just start to flinch. Drop back a half a grain, and shoot there till extremely comfortable. When that is tolerable, move on up.
I wouldn't have given you a plug nickle for the design, but now, I would be without one. What you effective have, is almost nuclear firepower in a 26 oz. package. When and if you need it, nothing else will do. And, if you do need it, your not gonna feel the recoil, anyway.
Good luck on your decision. I am sure alot of others will chime in here. There are alot of them, out there, in the world. Usually on the used market, with about one box of factory loads through them.
It is capable of breaking you, if you let it. It is also capable of being your best friend, especially if you need to use it. This is one gun that you have to learn to dominate, cause it will surely dominate you, if you don't do your homework.
Sorry for the long disertation, but there is really no easy answer.