@ 05:38 am (GMT)
Thomas Kitchenhi randy.
just having a read up on this thread what an interesting bit about the 150 interlocks anyway.
two things springs to mind
1 did you change powder charge when you changed seating depths? your barrel harmonics will change so you'll need to workout your coal then do your load development from there.
2 what dies are you using? if your concentricity isn't good a bigger jump may cause problems