Bob,
The 5400 psi load I listed was for 2 3/4 shell in 2 3/4 chamber. I shoot it in Parkers from 1881 on. If you want a short shell you can trim 2 3/4 hulls to 2 9/16. This will leave a small crimp memory and you reload as normal except you insert an overshot card. It is like an ugly roll crimp. I did some of these for two 16 gauge Parker's, but gave it up and just shoot 2 3/4" shells in the short chambers.
Harry
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