Thanks guys for your thoughts. I have asked the same question of Redding as I am using their dies but have had no response yet.
I can say without a doubt that it is not the shoulder that is causing the problem as I have one of Larry's digital headspace gauges Innovative Technologies - Reloading Equipment and I have checked the measurements
Case trim length is 1.843 so that's so the issue either.
There are no rub marks on the neck so I am pretty sure that neck thickness is not causing the tight fit I am reasonably confident its the base of the case expanding. If this is caused by excessive pressure I am not sure. This load is used by other shooters in the US all be it Varget not 2208 and I am coating the bullets with the Tubb Boron Nitride which will reduce pressure. I will go back to the range and try some reduced loads I still have all the chrony info from when I worked up the load. @dogmatix the small base die is not made in 6.5x47L @Bagheera its an old Mitutoyo digital @6x47 thanks for your load info I will see what Redding says
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