I have two 404 Jeffery caliber rifles. One a CZ 550 from their Custom Shop and a converted 375 H&H Winchester Mod. 70. Both of my rifles shoot under an inch group with Von Guff's load of 84 Gn. of H4350 pushing a 400 Gn. bullet. The three shots I put over a chronograph were 2300, 2309 & 2306 FPS. He used Woodleigh(s) while I used Swift A Frames. In 2018 I dropped a large Eland Bull at 85 yds. in its tracks. Literally, the animal was unable to take a single step forward or backward, it simply collapsed. We found the perfectly mushroomed bullet just under the skin of the opposite side. While other loads may work, I know this one does. Give it a try, it sure as hell won't hurt. I'm looking for photos of the A Frames we recovered from the Eland, I'll post them when I do.
