Keep in mind that Utradot's L/T is quite compact as well. I've tested the JPoint sight on my .480 SBH and it wouldn't hold any of the sight settings I dialed in. Don't know if it's just a bad unit or I've damaged it with recoil. It's not easy finding optics that will hold up to these revolvers.
Hi Max,,,,,,,,,I don't know if you remember but I put the Jpoint on my 45 Colt about the same time as you and had the same results as you. They promptly sent another and I haven't had any issues with this one. I would much rather have an adjustment for the brightness though. I will take a look at the L/T though.
