I used a 225g LRN & 6.5g Unique as my staple load for a long time before switching to a cleaner powder. I shot craploads of that load in my Colt 1911 and never had a problem or a high pressure sign. You could easily bump that load up a little. (Work it up slow, be careful, yada yada yada.)
Crimp should be .470-.471
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