JJ did give me the load of 81 gr of IMR 4831, which is what I use with 400 gr Woodleigh softs and 300 gr Hawk 300 gr with the .025jkt. I will be working up loads with Woodleigh solids with RL 15 and 4831 to see which shoots best.
I have shot this rifle to 300 yards on rocks, the flip up sights are spot on at 200 and 300.

One of the things unique to this double and the one other London Sporting Park Ltd rifle I have seen is the enscription on the barrels.

On the left bbl it says "THE SIGHTS ARE ACCURATE FOR THIS BARREL TO 400 YARDS".

On the right bbl it says, "THIS BARREL IS ACCURATE WITH THE LEFT TO 50 YARDS".

It has a standing leaf marked 50 yards and a folding leafs for 100, 200, 300, & 400 yards.

The inside of the bbls are perfect and look brand new.
I had JJ put a Leather recoil pad on it when I first bouight it.
It has been in several rainstorms in Alaska and Montana and the pad still looks brand new.