I use 4.6 gr behind a 122-125 gr LFP, at 1.090". It's a full case in Win brass, but runs from 90% to 105% in other brands.
Slight compression of Unique has been safe, in my loads. You'll have to test for yourself, if you need to know exactly how that load will perform.
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Don't even try it. It's even worse than the internet would lead you to believe.
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