NICE - well done and good history as well, Curly.

I found a load in my 1978 .375 Winchester which was actually quite low in pressure, but gave excellent accuracy with the 220gr HP Hornady.

42.0gr. H335 with a CCI250 primer. Due to the low weight of powder charge, the magnum primer might have been superfluous.

Vel. from my 20" bl. was 1,920fps. I shot two moose with this load, 1st shot through both shoulders bullet stopping under the hide on the outside of the shoulder, made 1 1/2 steps dropping dead. The next, shot through the lungs from the second rib, forward through the rear of the onside lung, through the off side lung into that shoulder, made 4 steps and dropped dead. That bullet exited sideways - I was impressed, but only one rib was hit, no other bone. Both moose were roughly 95 yards distant.

It is a quite low pressure, low (for the .375) velocity load that works.

I am sure it would be fine in your rifle, Curl.