Are you referring to the 44 mag and 22 LR/22 Mag ones?
If so, the fatal problem with them is that thry were made with barrel throats that are unacceptably oversize in order to eliminate lead spitting from the barrel/cylinder gap. Which is stupid, since they have the shields to catch that.
How oversized are they? You can fit an entire 22 LR cartridge, case and all, in the barrel throat. Yes, the barrel throat is well over .278" in diameter for a .226" bullet. The result is that the accuracy is larly non-existent and the velocity is poor for the barrel length they have. Especially 22 Magnum.
The 44 mag ones appear to have the same problem.
I badly want to like them, but you would have to rebarrel them out of the box.
