have used the IMR4320 in my 300 Savage [ a 99 featherweight from 1960] with 150 gr hornady Interlocks for a long time. Shoots really well.
Used the 4320 in my 7 x 57. Shot 140 gr and 150 gr bullets well.
The 4320 pushed 150 gr Partitions into little groups and thru whitetails.
none of the above was maximum loads.
and it fed thru my powder measure quite well.
Am hording what i have left.
