510wells, you may fire your double anyway you please, as can anyone who owns one! However,the proper sequince is RT, LFT, RT, LFT, on a double rifle regardless of how much it recoils. The reason for this is, the rifles are regulated that way at the maker's. If you will remember from fireing your double, the barrel being fired will instantly heat up as the bullet passes beneath your fingers through the barrel,It can be felt instantly. This sudden heat effects the steel, and because it is tied to the other barrel, it moves the cool barrel as it warps from steel expansion. This dirrectly effects the next shot from the other barrel. Since the barrels were regulated to account for this instant warpage, that is the way it should be fired. Sometimes you can get by with doing it backwards, but it isn't correct.

The fix for avoiding doubeling, is to learn how to shoot your rifle properly. I shoot double rifles with lots of recoil, and I don't double my rifles, and if done properly, you shouldn't either. The shotgun is a different story, unless the barrels are both the same choke, then it doesn't matter, as regulation on a shotgun is an accident at best, and is a very loosely "overlapping", of patterns. But if the chokes are different, then you fire the one first that has the choke you want.

This isn't the case with a double rifle, they must regulate perfectly, and the sequince dirrectly effects that, in most cases, especially on shots over 100 yds! I will admit, at ten yds, on a chargeing Buffalo, it most likely doesn't matter, because this is a "POINT, AND SHOOT" sittuation, and aiming is, in most cases, not a factor, anyway. If you only intend useing your double only for stopping, then use the rear trigger first. If however, you use your rifle to hunt with, which is what it was made for, then doing it properly is a habit that one is well advised to learn!

I'll let the origenal poster of the question decide what he wants to do with "HIS" double rifle. After 48 years of building,hunting, and shooting with double rifles of every size from .22 hornet, to 577NE, I'll shoot mine RT,LFT, RT, LFT. Others may do as it suits them!