It's what Brewer's Friend tells me, I'm using 5.7kg of grain (62% base, 28% speciality, 10% adjunts) so that if I hit a 66% AA it should give me 5% ABV and a FG of 1.019. I imagine it'll be more like 68% but if its 64% I can always let it condition in my secondary.
I've upped the IBU's from 19...