I think you should buy some factory brass. Get the hang of reloading that. Then move on to making your own.
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I will do that!There's your problem.
I'd try to put them in. 308 head sizing die and removing that decapping pin and see if that works.
Yeah I have mine around there. Actaully mine is 1.353" +/- .002I will tumble, deprime, then swage the casings. Then I will cut the case with the HF saw, right below the shoulder. Debur and chamfer any questionable pieces (not all) then size them. Trim with the little crow trimmer, then debur and chamfer all pieces. Re-tumble then ready to load.
Trim length is 1.355 +/- .002.
I think you should buy some factory brass. Get the hang of reloading that. Then move on to making your own.
What gauges have cut outs like that?
My guess you have a case overall length issue. I chop the case , trim, size and trim again. Final case prep is annealing them. Besides case length problems I'd think your die isnt adjusted properly.
OBTW I forgot a step. I turn my necks since forming the 223 case to a 300 produce's a thicker neck wall. I use mostly Lake City brass. How did I find this out. My newly loaded round would not feed into the chamber. None of my 300 AR platforms fed. However, they would work fine in my bolt and single shot rifles.
Shoulder isn't low enough. Take the decapping pin out, turn you resizing die down a 1/8 turn and then check it. If it doesn't fit, turn it another 1/8 until it does.
What gauges have cut outs like that?