Sad to say Coosa, is that most S X S shooters don't even know if the loads they're shooting regulate in their S X S gun. I've found that lots of vintage S X Ss prefer a certain payload at a certain velocity, and loads a lot faster, lighter, etc. will NOT regulate, but will crossfire badly, or vice versa. I'm certain I have several that would not even come close to being regulated with 3/4 oz. loads, at any reasonable velocity.
I've not had that problem with the vintage guns that I have patterned, which surprises me to some degree. The only double that I have had that would not regulate was a Darne. It would not regulate with anything from 7/8 to 1.5 oz., and all of those were equally awful across a range of velocities below 1300 fps.
![[Linked Image from i.imgur.com]](https://i.imgur.com/qclHjMQ.jpg)
