i do on my 380 thunder its very noticeable.maybe if your gun is new it doesn't show as much.not sure.the spring nearest the muzzle turn it so where spring begins straight up at 12 o'clock high.I did not notice much difference between the two ends. I suppose I could put a micrometer on them to see which is narrower, but I can't discern it with the naked eye, and I don't notice one end fitting over the barrel any easier than the other.
Get some 3M Safety Walk Step and Ladder Tread Tape...cut it fit places on both sides of the slide, where you grip it.I love my little Bersa 380 CC but, I am having difficulty removing the slide. My wrists and fingers are arthritic and the slide is very tight tto the frame on disassembly. Any suggestions? Is anyone else experiencing this problem?