Is it produced by Hodgdon? (I know it is a legacy DuPont label)
They might explain the low 4350 output this year as I just found a full shelf of it.
After digging through a few guides it's burn rate seems to fall right between IMR 4350 and H4350 but it is temperature stabilized...(so the can says)...
My gut feeling from my fist scan of the data is that it gives a closer match to target velocities with lighter projectiles....