I'm having some occasional doubling on my Ithaca (Miller copy) trigger. Dan May said he would be glad to look it over and was confident that he could fix it. Dan is a member here and his site can be found by googling Miller Trigger.

As for seeing if it doubles when dry firing, you can tell by the selective ejectors if so equipped. But frankly, most doubling is induced by the recoil of the first barrel IMO.

Last edited by Chuck H; 04/18/12 12:29 AM.