jsalcedo:
I'm loaded with 155 XTP .40 reloads in my USPc carry weapon, and will use 110 XTP's in the .38 CDS during the winter. Practice rounds are, as you'd expect, cast, sized and lubed lead.
I do get cheap, at times, though, since the practice/carry load for the Charter Bulldog is the 245 cast lead SWC at, I guess, about 750 FPS or so.
I figure that, in lineotype, it isn't going to expand, but I doubt that it'll stop either, and a pair of 1/2" holes has just gotta slow you down a bit.
I use standard load data, normally at least one full notch below the maximum value, minus a bit. Since I'd be in defensive only mode, I've an incoming target at 7 yards or less, and I can deal with a 50 fps velocity loss without a problem. Also, since I load on a Dillon, I prefer some space between me and max.
I doubt that there'd be a problem using handloaded ammo in a "good shoot", nor do I doubt the bullet or the reliability of the reloads. Somewhere around here there's a thread on the legal issues, and it seems not to be a problem.
Good luck pasting the "hand tailored killer bullets" crap on me: I've not fired any factory rounds, .22 RF excepted, since I got the USPc four or five years ago, and I bought then only because I hadn't set up for the .40 and it is a simple impossibility for me to bring a new weapon home and not fire it.
Anyway, I feel the risk is in the reliability of the rounds that you produce and the bullet you load, not the legal side. 'course I'm not a liar, whoops, legal professional, so the worth of my advise is zero, but, if the situation ever comes up, I start a thread and post the result.