If your wrist really bother you then you could go as low as .32s.
I would go with Rugers for revolvers because you can't go wrong with Rugers unless you found a good deal on something used, of course you can probably find good deals on used Rugers right now too.
There's a lot of good pistols out there though so really go with what feels best to you here.
A Marlin is a much better and easier choice for a rifle than a '92. It will be easier to find ammo that feeds through it consistently, the action is smoother and shorter than that of a '92 and it's easier to find good smiths for them. You won't regret buying a Marlin. If you can afford it the most competitive rifles are the '66s and the '73s. Very easy to find good smiths for them, they are very easy to take down and clean, very easy to maintain, they are the least picky of the rifles as far as ammo goes but they are the most expensive of the three rifles. There are tons of choices with the '73 action as well.
An sxs will be the least expensive shotgun. Also easy to maintain, easy to find smiths for and many of the more competitive shooters have switched to an SxS because there are less things that can go wrong with them. I think they are the devil myself and LOVE my '97s. Someone will probably come along who can tell you more about the different double barrels that are available. I would say get to the range and for a match and try some of the other cowboys guns out. Cowboys and girls love to let people shoot their guns and there is no better way to tell what suits you and fits you better than actually shooting them.
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