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.
"Such is the strange way that man works -- first he virtually destroys a species and then does everything in his power to restore it."