Effective range of a snubby
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I can usually throw mine across the room and hit a guy with pretty good accuracy
ROFL!!
But that's basically it.
When you say snubby, that's a pretty broad term.
My 686 (no dash) snubby, I'd have no problem whatsoever hitting a business card sitting perfectly still from a ready position in perfect daylight at 25 yards. Single action, no time pressure.
I have a 3" ported .44 mag performance center trail boss that I have no problem hitting a running raccoon while chasing after it at 15 yards. In double action with full throttle loads. Through the woods. In late afternoon shade. (They run much faster than you think!!)
However those are not concealment type snubbies, they have full usable sights, nice triggers, and I have practiced with them a LOT. As well as being uncharacteristically accurate for their size. And I've adjusted my nice adjustable sights to a dead zero for my handloads tuned FOR THOSE GUNS.
The sub 2" category of lightweight carry guns usually have fixed sights that are basically just a groove cut in the topstrap matching up to a bump on the end of the barrel.
Broad daylight from a rest while mildly distracted and you'll have a problem hitting a stationary paper plate target at 15 yards without a lot of practice. Don't BS yourself.
Moving target from a draw 7-10 yards while mildly stressed in good lighting, best I can hope for. Factory ammo. 3 out of 5 on a pie plate in 3 seconds. Again, don't BS yourself. People tend not to practice with these types of guns, but this is where they need the most practice.
Throw on a set of crimson trace lasergrips and that makes up for bad sights.
Or buy a snubby with a usable sight picture. Usable in low light/bad conditions.
But above all, practice, practice, practice.