Yes, it does. I've wondered about its 'Accurate' lines too. It seems a lot of trouble to be making a third product range, so suspect that the Accurate powders are as per equivalent single-based IMR grades, maybe taken from production lots that are at one end or other of burning rate spreads.
On the wider question, the Sierra VI edition manual that was published last year has a lot of 'Enduron' loads in it. I have noticed a tendency for their maximum loads to be topped out one MV step below Hodgdon 'Extreme' equivalents.
The other 'oddity' is that Hodgdon aside, 4166 gets few or no 223 Rem loads in any source I've looked at. Sierra provides them for 52-55 and 60gn bullets in its 'Bolt Guns' section only out of its many pages of loads. Nothing at all in the 'AR' section. Hodgdon gives data for all bullet weights, but its max charges are around 2gn less than H4895 in the very low levels dictated by pressure-testing in a SAAMI spec 223 Rem short-freebore chamber. That's despite the company's burning rate tables showing it slightly slower burning than IMR-4895, and a few steps slower than H4895 making it look an ideal choice for this cartridge. Is there something about AR port-pressures with this powder? Larger cartridges 308 Win, .30-06 etc - yes, plenty of loads and charges very close to those for H4895, sometimes a tad higher although they only rarely match H4895 velocities in Sierra VI at least.