What sizing method are you using? I PC first, then do a straight push through lee sizing die at .278". A traditional lube/sizer requires a well fit nose punch to help prevent "bending", something I bet your custom mold didn't come with???I’m currently working on cast subsonics for my 6.8. Custom mold for 214gr Bullets. Planning on pc but having trouble with the bullets bending after sizing. Shot some unsized yesterday with good results other than not enough powder to cycle the action. I’ll keep tweaking it. It was only a function test on the new ar build I completed. My normal plinking load cycled perfectly.
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