I hate trimming brass so I quit reloading rifle for awhile. Started shooting a lot more rifle rounds so starting up again. I bought a little crow Gunworks worlds finest trimmer. Set up seemed simple. Had a case that was the exact length of 1.750 tightened everything down to that length. Somehow I keep getting different lengths on my cases. Nothing is moving but I’m moving up and down from 1.755-1.747 in case length after trim. Why am I getting this difference. I don’t mind the different length because I don’t trim anything that’s below max length 1.760 after resizing. I can’t really tell a difference in accuracy or anything with the differences but I’m wondering if the variations in length is normal. I keep every case in the here until it quits trimming and making contact. I just don’t see how the differences are there.