Hard to get a "true" double with a DT gun by slipping from the front trigger to the back.
left handed...hot barrels it's not real hard.
By a "true" double, I mean a virtually simultaneous report. You can't move your finger fast enough, from one trigger to the other, to do that. Those that have been around guns that have doubled will have observed one big boom (true double), as well as a very fast boom-boom, two distinct but very rapid reports. Unless you have two fingers in the trigger guard and pull both at the same time, the one big boom isn't going to happen as a result of anything you do with your trigger finger, on a DT gun.
Re Jones' test, all you need is the snap cap, and you don't need to examine anything. After you've pulled the front trigger, pull the rear. If it goes click, the gun would not have doubled had that barrel been loaded with a live round. If that hammer dropped (slack trigger when you pull it) and you're sure you did not slip back to the rear trigger, then you've likely got a sear issue.
If you are left handed it most certainly can be done....if you are right handed it's damn near impossible for your finger to slip back and hit the rear trigger. (yOu should get out more Brown)
And you should do some work on capitalization, jOe. Really important subject, you know. After all, it's the difference between helping your Uncle Jack off his horse and helping your uncle jack off his horse.
Slipping from one trigger to the other, no matter whether it happens to a righty or a southpaw, still requires a time lag for the finger to get from one trigger to the other. So the "double" you get is a very rapid boom-boom, not one single, louder boom. Try it with snappies, jOe, after you've completed your capitalization homework. And tell us whether you get one louder click or a rapid click-click.
As for it being more likely to happen to a lefty . . . well maybe, but it depends on the gun. The "lefties have a higher probability of slipping" thing would seem to be true, since each trigger has its own slot, and the front trigger is in the right slot--meaning the left trigger is farther left. However, take a look at your DT guns and you will see that on many of them, the front trigger is slightly canted to the left, putting the bottom of the right trigger blade pretty much in line with the left trigger.
