Jonathan I would get that one shot spray and throw it as far away as you can. If you want to use a spray lube try the Dillion stuff. Or else use a wax either imperial sizing wax or Hornady sizing wax. I am using the Hornady wax at present and find it good. I would say you might be pulling the necks back out with neck mandrel.
As mikee says I would only go 2/3 of the way down the neck. So your not affecting the shoulder neck Junction area.
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