What I would do to check alignment, esp. on a snubby...
My method would require dry-firing it five times. What you do is, you dry-fire, no snap-caps, and keep holding the trigger back at end-of-stroke.
You've now got the gun in "full lockup".
Take any good concentrated light, and shine it into the area at the back of the cylinder, behind the cylinder bore that's in-line with the barrel. A small flashlight, Photon light or whatever is perfect.
Now look down the barrel. You'll be able to spot whether the cylinder bore is in line with the barrel, the light will backlight the bores.
Repeat for each cylinder. While you're at it, see if the cylinder wiggles any in the front-back direction, or more than a little bit in the "spin direction". And if you're really anal, check the barrel/cylinder gap either by eyeball looking sideways at the gap held up against a distant light, or with feeler gauges. .007" is disgusting but still "in spec", .002" is very tight (nice velocity boost) but still "streetable" - in my gun at that spec, I have to wipe the cylinder face after about 50 rounds or cylinder spin gets "grindy". I can accept that in exchange for max velocity, given that it's a snubby.
Jim