I find the Argentine gloves made for polo to be about as comfortable as any for shooting. They are quite supple leather, but stand hard use well. While I can appreciate your concern for protection, and without meaning this in any terse sense, it is best to shoot a gun that is sound and on face with reasonable loads and not worry about grenade proof gloves. I doubt that I could shoot at all if I had something like that floating around in my mind when pulling the trigger.
Although rare, we do read or hear of ruptures, but seldom with exact information as to cause, but it most likely is the result of something well outside the parameters I described above. Want more killing power [?] use bigger sized shot. Keep the velocity to 1220 fps. Learn the leads necessary to hit those longer targets, if that is the kind of shooting you are doing. Pattern the gun to determine its effective range with a given load & choke, then you can fully appreciate the luck involved for a truely long range shot.
To your original question, there are Kelvar gloves made for fish cleaning that are quite flexible. They are sold to keep one from getting cut. You could also look at what the bomb squad guys wear. I have no familiarity with their pref'd gear, but would think it would require allowing some dexterity to be of any value.
