7828 ssc works very well in my 270 AM with 150gr and below bullet weights. Until I discovered 7828ssc I was launching those light bullets with US 869 with limited velocity and maximum muzzle blast.
There has not been a single symptom of powder bridging with the short kernels. I like that. Had major problems with standard stick powders.
I suspect it may be a bit temperature sensitive but my seating depth may have contributed to the loss of about 50 FPS from 56*F to 30*F. Thourgh with the much shorter COAL (about 50 thou I would have expected pressure and velocity to go up?? Validation will happen shortly tho it will be delayed by a couple of days in the mountains.