I tried IMR4895 a few years ago in the 223 with 75 and 77gr bullets. Going by the books and using Moly, I couldn't ever get worthwhile velocity out of it. 2,400 - 2,500fps was all I got with several AR15s. Due to the aquisition of some cheap surplus powder, I've revisited it. This time I've been pushing the loads up with Remington 7 1/2 primers. I've gone all the way up to 26gr and 2,750fps with no pressure signs and settled on 25.5gr to get into what I believe to be the velocity sweet spot for 75 Hornadys, about 2,700fps. According to the books, this should be way hot. Usually, Moly only requires an additional .5 - 1gr extra powder. In this case it's more like 2grs.

Does this fit with your experiences with this powder?
What have you found with this powder and class of bullets, both bare and Moly?

BECoole, your post set me to thinking, so I dug up some old ammo boxes just to be sure.
This is what I loaded for the old AR I was using:
FC cases
77 grain Hornady #2279
FED 205 primer
23.0gr surplus IMR 4895
COL 2.260"
Looking the old brass over, it was indeed a mild load in that old AR15. Wish I could give you the velocities and powder lot number, but that info haas been lost to time.
Most of the hi-power boys around here are using 24.5 gr of Varget with the various 77 and 80gr pills. The next load I cook up for the AR will most likely revolve around V-V powder.

If I fill the 223 case to the mouth with surplus IMR4895, about 27 gr fits.
If I seat and compress with a 60 gr moly bullet, I get .001" extractor groove expansion, meaning this is the real limit if I want long brass life.

3485 fps out of my Ruger #1.