This is the first time I have tried loading anything other than Jacketed bullets and I need an answer. I bought some coated Semi Wadcutter bullets from Missouri Bullet Co. and I am using 40 S&W nickel R&P cases and I had belled them for jacketed bullets. I started noticing a little lead being shaved off of the bullet when installed to col and swaged. I rebelled the cases bigger and the shavings came when the bullet came to the part by the head of the bullet not when it started entering the case. I thought that my belling wasn't big enough so I rebelled them a little bigger. What I am wondering is: Is the lead shaving being caused by the taper crimp being too much or what is causing the lead to be shaved. Not every bullet is being shaved so can someone familiar with Lead Semi Wadcutters and loading Nickel cases tell me what I might be doing wrong?? Thanks to everyone who knows the answer to my question.