makin' Major
Let's assume a 5" 1911; let's assume you wish to 'make Major'.
230g RN (I use lead because it costs less, and will never wear out your barrel), sized case, CCI300, OAL 1.245--1.265", 5.0--5.3g W231.
These last two numbers are based on your specific gun.
Proven: CCI300, sized...