You can certainly make a revolver too tight! I had that experience on one of the smallest revolvers around, the NAA mini-revolver. I got one that seemed to have an unusually large gap, and I sent it back for them to correct it. I got it back, and the gap was then about .003, but it seemed to function fine. I took it out, and after about 3 shots, it would bind, just that small amount of temperature rise would jam it. I sent it back and it came back with .007, and that worked fine.