No he uses balance beam. Interestingly he said they shot fine but had a little smoke on the 2 in question. Those to primers were not penetrated. He measures OAL rather than CBTO. Don't know if you can measure CBTO on 22 cal but perhaps these two were jammed into the lands although bolt was not hard to close.Does he by chance use a powder dispenser like a charge master or lymans version. I screwed up a few years ago and forgot to clean out the dispensers tube . Luckily as soon as I went to get a pan full of what should have been w748 it came out an imr powder. It could happen and I’m sure it has .