If you're using Hodgdon's website's load data for Longshot & 45 ACP +P loads you have to go to the 45 Super section & then that's barely over standard 45 ACP pressure (18K CUP).

Their 230gr Longshot 45 SUPER load is 19.8K CUP, definitely not a true 45 SUPER load, but would qualify as 45 ACP (+P) if SAAMI defined one using CUP (only defined using PSI).

No need to use 45 SUPER brass for (+P) loads useless you have poorly supported chambers.

I shoot real 45 SUPER loads (45 ACP +P+) in several of my 3rd Gens, & revolvers as well as my Series 70 1911 set-up for these. No idea why (+P) would be too much for a 1911.

The OP never did tell us what he's loading for.

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