Ok, StarLine brass new...annealed after firing. I have .003 shoulder setback, using g Hornady .350 insert, trimmed to 1.485. These were new cases....were not a annealed before forming....original base to Datum was 1.184- 1.185, resizes to 1.182-1.183. Have been forming wildcat cases since the 70's (7mm IHMSA), and have a decent grasp on the procedure. I also shoot multiple 6mm Norma Dasher in competition, so I do pay attention to the proper details. This isn't meant to say I'm perfect, just that I do have experience loading for different calibers/cartridges. My main grips is that the factory loads that had mild pressure signs (flat primers, slight ejector marks,) which a couple of the cracked cases (StarLine)didn't show pressure signs. The datum measurement was measured off of multiple factory cases fired in rifle, without problems, before the BTD was set up on new cases. There was no fitment problems in chamber. Feed ramps were polished before ever being fired with bullet tip felt polishing tip and Dremel polishing compound until mirror shine and no sharp edges at all. Please let me know what other info will help with solving this dilemma.. rsbhunter
Just reread the posts, I'm not experiencing inciepient head separation, these cracks run length wise on the case, not above the extractor groove. And besides, on a new case , if I did that much shoulder set back, it probably wouldn't have fired for excessive head spacing.....rsbhunter
Just reread the posts, I'm not experiencing inciepient head separation, these cracks run length wise on the case, not above the extractor groove. And besides, on a new case , if I did that much shoulder set back, it probably wouldn't have fired for excessive head spacing.....rsbhunter