Normally a rotation problem on a 38 would be either a High Primer, or debris under the ejector star. If factory shoots fine, then I would check to make sure the primers are flush. After that I would start checking your reloads against a factory round, and see what is different on measurments.
On the 45 auto you could possibly have some bulged cases near the base. I have been running all of my brass through a Lee Bulge Buster lately. I do this mainly because I shoot lots of 45acp through a 625 revolver.
I have never had any problems with case length, but I guess that is possible.
Keep on checking things.
Bob
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