The moral of the story is .... NEVER .... and I mean NEVER .... shoot reloads that you haven't done yourself. Commercial reloads are generally OK, as long as the brass is quality, because they have the company's deep pockets behind them. Personal reloads ... NO WAY. You have no idea what some yahoo did fooling around with loads.
I also just noticed .... that A-Merc brass is about the WORST brass on the earth. The tolerances are generally way off, the thicknesses are inconsistent, and the primer pockets ALWAYS gave me a problem. When I see any A-Merc brass I just throw it away ... other brand name brass I shoot 10+ times or until it splits.
If I were you or your brother in law, I'd return that batch of reloads to Cabelas and get your money back (show them that casing in the pic). If they're using A-merc brass you don't want those reloads.
It kind of looks like the round was fired while the gun was out of battery to blow out all around like that. I would check your gun. With an
UNLOADED mag seated in the gun, and an
EMPTY GUN, rack the slide so that striker is cocked and the gun would be ready to fire. Now move the slide rearward about 1/8 - 1/4 inch and hold it there. Try to pull the trigger. If the striker fires, you have a gun that would fire 'out of battery' or without the slide fully locked up in the forward position. The striker (or hammer) if so equipped, should NEVER drop or fire unless the slide is locked
ALL THE WAY FORWARD. If your gun will do that, it needs to go back to Ruger ASAP. The fact that you got powder all over your hands also leads me to believe that the gun fired 'out of battery', which is a very serious defect that needs to be corrected ASAP, if the problem exists.
By the way, there may have been 'black' in color powder on your hands, but it wasn't 'black powder'.
REV