I disassembled all the dummy rounds. I shortened the section of dowel that I was using to reduce set-back of the bullet with repeated usage. The new dimension was 10.0mm. With that shorter length I was able to seat the 200 gr LSWC slugs for the O.A.L. of 1.215" as Hawkmoon had suggested previously. Here are the results. All of them fed perfectly and ejected perfectly. I was startled and happy by this turn of events, to say the least.
While working towards the 1.215" O.A.L. I had loaded 3 others that exceeded that amount while trying to figure the exact amount to cut from the dowel. The longest of them was 1.232". I fed them through the Auto Ordnance. They all seated flawlessly and ejected flawlessly.
I do plan to push the window a bit, by seating for an O.A.L. a little beyond 1.232 but well below my previous settings, but that will be a project for some other day. For now I have the numbers for making dummy rounds that I know will feed into the chamber and eject with no problems.
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