I like 17gr Unique for a reduced load in my 308. With a 168gr bullet it gets 1900 fps from a 26" bbl.
If you loaded the same charge under a 110gr bullet it should be a real powder puff, probably 2100 fps or so from a 16.5" bbl. Similar to a 30 Carbine load.
I like 17gr Unique in the 308 for a reason. 32gr of Unique is a full case to the top of the neck in fireformed Win brass. So by using a 17 grain charge, If I were to somehow double-charge the case, I would have powder overflowing. There's no way I could accidentally double-charge the case and not realize it.
With a 15gr charge, it could be possible to double it, throw 30gr without any obvious indicators, and blow up your gun and yourself.
