We've had reports of .38+P lead loads being pulled out of the shells under recoil, tying up the guns in the lightest Scandium guns. With the .357 versions, some are seeing the same thing with *jacketed* hot loads.
To me, if you really need a superlight snubby, .32H&RMagnum may be the way to go. You get more velocity than with .38+P, because the better .32Mag loads are 85 or 100 grains. 1,000fps from a snubby .32Mag is easily available. That means a jacketed load will expand, so you don't need to go to soft lead, so you get less bullet pulling problems than with a .38+P lead load.
Hmmm. Not sure I'm explaining this right.
With a .38+P, 125grains or more, you're seldom going to get more than 900fps in a 2". With a 158, you'll get around 800fps from a 2" barrel. Which is fine, if you stick with a plain lead hollowpoint versus jacketed - the plain lead works better at .38 speeds. But being slick, plain lead can be yanked out of the shell under heavy recoil, and some of the 12oz Scandium guns are doing just this.
With a 32Mag, bullet weight is down but speed is up and recoil is down, so the best loads are jacketed. Even the lightest .32Mag guns aren't yanking jacketed bullets out of the shells.
The lightest .357 Scandium guns are worse - they're yanking lead .38+Ps, and per some reports even jacketed .357s are yanking.
If you have to thoroughly test a particular load in your superlight gun to make sure it can stand up to the recoil, then...well, as far as I'm concerned, it's too damn light. I would stick with at least 14oz for a .38, 17oz for a .357. If you MUST have something between 10oz and 13oz, you want a .32Mag six-shot, .22Mag 8-shot or a 9-shot .22LR.
This is just my opinion. I'm not completely against Scandium, in fact I consider the 7-shot Scandium .357 at 18oz a VERY cool idea, because you've got just enough weight there so you aren't yanking loads clean out the shells. That gun isn't reported to be doing that, which is one data point I'm basing my "minimum suggested weight recommendation" on.