If you feel you need 2 1/2 inch cartridges, then by all means find a way to make them.
However, I've shot tens of thousands of standard 2 3/4 inch cartridges in a host of Parker, Fox, and English 2 1/2 inch chamber guns for over three decades with absolutely no ill effects on the gun or the cases. All velocity under 1200 fps.
But if you feel you need 2 1/2, make them up!
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