Well - that's hard to say. I tested it yesterday on paper, and due to the wind blowing, had the devil of a time. I shot enough at 50 yards to show good grouping form each tube - approximately 7/8" 'on centres' groups for each barrel, but positioned 1/2" apart and with the right barrel printing 1 1/4" higher than the left barrel. They were crossing - dammit. At times with the wind shifts, I got caught and threw the shot out by a good 2" or more to the left. It was blowing a gale, switching often and not keeping steady. I'll have to re-sight, obviously, as the tight grouping happened in a fairly steady cross wind from the right. The wind switched to f6 o'clock, blowing my hat off as I fired. These 2 balls with the wind at my back ended up over 2" higher than the previous grouping. I guess this shows the amount of wind that was blowing.

100gr. 2f loads were crossing by 1 1/2 to 1 3/4"@ 50 yards, while dropping the charge to 82gr. (3 drams) brought the crossing down to 1/2" - usable I guess. I actually thought it would go the other way, with the extra recoil opening up the crossing, bringing the tubes in line with a specific load. More testing is needed, of course. It seemed to me that less powder made them cross less (made the barrels shoot farther apart - the opposite of what one wants in a hunting rifle. I would rather have the rifle cross with light loads and shoot parallel with a heavy charge.

As-is, it's useable for deer or black bear with the piddling 3 dram load but I prefer more powder for larger animals. 3 drams barely gives 1,400fps.

I need to spend another day or two at the range with both 2F and 3F and will do that this coming week.