How did your reloader come to the load he did? Did he work up and test fire or simply load you up with this load based on a different rifle? I personally wouldn't be starting out with a hot load. If you cross reference H4831 and IMR 4831 in Nosler 5th they list 66gr as max with 140 gr bullet using the IMR version, both are identical load datain 150 class bullet according to nosler, so your a full 3 grains over!! If it were me I won't shoot these loads unless I verified pressure,etc by going through the required steps of working up a load.

All are guesses unfortunately as every gun is different and every load must be verified in each gun! No easy route when developing a load..sorry just the way she rolls.