I just bought a nice-looking, excellent condition stainless steel Ruger 44Mag cylinder from one of the gentlemen here on the forum. Dimensionally, it measures the proper length and diameter for my revolver. I got it since my existing cylinder is fluted and this one is non-fluted, and I wanted to change up the look. So I installed the cylinder and it fits, but to my surprise, I can’t cock the hammer and get it to rotate the cylinder. Is it just a matter of finding a revolver that it will work in, or does it need to be fitted to my revolver? I didn’t measure the barrel-to-cylinder gap, but it appears to be a few thousandths since I can see a little light through the gap. Thanks!