For the ammo, consider what is considered a standard self-defense distance- I think it is like 15-20 feet but I'm too lazy to google it. Snubbies like the LCR are made to be gut guns essentially- hence the awful little sights (though admittedly better than some other snubs). At a distance like that or even a bit farther, bullet weight will be fairly inconsequential. IMO expansion is a much bigger consideration than bullet weight, especially considering how much powder goes unburned and pressure unrealized in that short of a barrel- you don't need to worry about bullet drop or wind drift.
I second cheapshooter's suggestion of the SB Speer loads- they're made to make the most of what a gun like this has to offer. After that, I know I usually go with a large cavity hollow point like hydra-shoks or a tipped HP like critical defense to aid in expansion at lower velocities. One of the best things about a revolver as a carry gun is you can typically feed anything through it, so really heavily scored or other super-expanding rounds that can be troublesome in semi-autos can really reach their potential.
But just go with what your gun likes and is comfortable for you. People can debate "stopping power" all day long but in reality you're comparing getting hit with a Camry at 80 miles per hour to getting hit with a Suburban at 70 miles per hour... both are pretty much going to suck for the object on the receiving end.
My favorite holster for my LCR is mt Galco Tuck-n-go. I prefer IWB for carry whenever possible as I find it is easiest to conceal and feels most secure to me, but the gun is so small and lightweight that you can carry it just about any way and forget it is there.
