Runt,
Remember, it doesn't take more than a grain or two of something hot and sharp to give you a lot of trouble.
I, actually, HAVE shot a Magnaported S&W snubbie from a high retention position.
I wear glasses, so my eyes were at least protected, but a chunk of something hit my nose hard enough to bring a bloodspot. Something hitting the eye that hard can do some seriously painful damage.
I think Tyro's advice is pretty good, as long as you're cognizant of what kind of porting is on the gun before you start training yourself to do that.
But, as I said earlier, I just don't see the reason for porting on a small defensive handgun like this.
One of the Titanium .41 or .44 Mags. maybe, but I'm not going to be picking one of those for CCW. Physically I think they're way too big for me to easily conceal.