If you ran an inside neck reammer in the brass you actually could have made the problem worse!! If you took .001 - .003 more and made theneck wall thinner,then when it squezzes it down it will make more of a gap between the outside and the neck area of the barrel..for that matter don't even take any off the out either..it'll just make more of a gap also...just partially size the neck and see what happens...