Any experience with the Cobra or Davis?
Yeah, I have a Davis in .22lr. From what I gather, Davis went under and resurfaced as Cobra Industries.
It's a POS. Poor materials, poorly assembled, no safety to speak of, double digit trigger pull - best guess low to mid teens. Closing it w/the hammer down and loaded chambers can casue it to fire since the firing pin's aren't the inertia type. Accuracy in one barrel is non-existant - probably due to the (as Thebluesman so abtly put it) the "subtle" rifiling. I have to agree, the land (note the singular) is pretty shallow.
Still and all, the thing is a hoot and a half to shoot. I actually do use mine as a woking gun too. In the spring, when the grass is real heavy, sometimes snakes get caught up in the mower blades. .22shot shells from close up put them out of their misery. No doubt, I'd rethink that tactic if the snakes were poisonous. Most are garter types.
If the guys are gunnies, and like derringers, I think it would be a pretty cool gift.<-- as long as they know the things are mostly a toy. Real key is the liking a derringer. Not all people do.***
.22 cal is definaly the caliber to get one in. Limit the ammunition to low power standard velocity and it should last a long time. CB caps and/or the Aguilla(sp?) powderless ammo would be even better.
Don't run high or hyper vel stuff thru it.
***PS - might want to print this out and leave it laying around - start dropping hints - set the stage so to speak. Usually people that ask about derringers fancy them themselves. Probably make a good 6mth or 1st year anniversary gift or stocking stuffer for the groom.
PPS - congrats on your upcoming event. Going on 22 years here soon @ the old ball and chain. Best thing I ever did.