...3) Powder measure is a Lee disk type. Sometimes the "red dots" make it a bit harder to cycle.
...
So you have had issues with the powder measure hanging up with this particular powder? This, I suspect, is the root cause.
...3) Powder measure is a Lee disk type. Sometimes the "red dots" make it a bit harder to cycle.
...
I am not "overexpanding" the case mouths. They are so tight sometimes they slightly shave a bit of lead from bullets. Also, no "split mouths". Sometimes bullets are still loose (will turn) after seating.
I AGREE. I WILL BE SURPRISED IF YOUR PROBLEM IS TRACEABLE TO YOUR BRASS. ANY PROBLEM THAT I HAVE HAD WITH SQUIBS, THROUGH DECADES OF SHOOTING RELOADS (NONE MY OWN---LOADED BY MY LGS) HAS BEEN DUE TO AN ERROR IN THE LOADING OF POWDER. THE CARTRIDGES ALWAYS LOOK BEAUTIFUL…...When they split lengthwise starting at the neck they're no good.
Or the mouth is damaged enough to interfere with bullet seating or chambering.
Up to that point, load them.
I doubt your problem is "worn out" brass.
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I have one of those powder measures on a Lee 1000 Pro I got in a trade. That and their primer feed are the reasons that It's seldom used. It will make a popping sound when it short charges or fails to load at all. I loaded 500 357 magnum loads and then found this trate. I weighed all 500 and found 38 that were very light or no powder. I was juat lucky that I was loading a stiff charge of H-110 so that the scale pointed them out!