The link I posted shows a maximum of 45 grains of IMR4064 with the 180 grain Nosler BT bullet. The load you referenced of 48 grains of IMR4064 appears to be over maximum. Hope this helps. All the best...
180 GR. NOS BT IMR IMR 4064 .323" 3.020" 40.0 2259 35,400 CUP 45.0C 2538 47,800 CUp
That is 1gr over max according to Nosler #5 manual! Thats using IMR4064!!! Remember there is also a H4064? So which powder is that data from? What powder do you have? Always double check any data you get off the net with a manual!
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