7.5x55 Swiss Reloading

The two biggest problems that most experience are: sizing and cartridge length. Undersizing and lubing can be the biggest stumbling block for many.
I've not seen anyone mention caster oil or STP as lubricants, both work great, along with many other lubes.
Oversizing brass chambers easily, but may lead to reduced case life.
284 is a bit harder to reform than to resize 7.5,but not much more. I've used it many years with no problems. Maybe I'm missing something, but reformed 284 to 7.5 cases are loaded like anyother 7.5 case. Everyone should rework up when changing componets, right. Many years ago 284, Norma, Berdan primpers, or make your own brass were the only options.
It seems a number of people dont try to cycle the reloads through their actons to comfirm function before getting to the firing line. Best-of-luck-Yall
 
Some reloads will not chamber

I'm having problems chambering my reloads in two different K31's. I size with Lee dies and trim according to my Sierra or Hornady handbooks. My lube is RCBS and applied with the pad and wiped off the case mouths with a rag after a .30 cal brush goes thru once. I originally bought 15 boxes of PRVI 7.5 X 55 Swiss, which shot great in both rifles. The first reloading worked fine, but subsequent reloads are about 1 cartridge in 5 that fail to reload, although I'm not sure all cases have been fired the same number of times.
 
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