Yukontom
AH senior member
A Beauty there sir... It looks like we closely agree on a 404 Jeff formula. I did waive the rear sight believing they are a backup proposition. I used Talley quick detach rings and when in the bush carry the Talley ghost ring peep that slides onto the rear scope base if needed. Without a rib or island sight it kept the weight just under 10-1/2 lbs. all in.Beautiful .404 there! …. And solid post.
That velocity “window” with a 400grn bullet - which I like to call the Kynoch-Jeffery window - is roughly 1975fps as a minimum to 2125fps as a maximum. 2000fps-2050fps is what I try to load to in my rifle although I use Varget since it’s virtually temp-immune, more so than RL-15 and 4064. Good accuracy. All three powders track close together on the burn-rate chart.
I can also get 2000fps with 5744 which doesn’t require filler material. I got excellent accuracy playing around with the 5744 and Woodleigh’s 350grn Jeff bullets. I stocked up on about ten boxes of those before their fire. The 400grn bullets I have are Hornady DGX SPs. When Woodleigh gets back up to cranking out his 404 RN SPs, I’ll switch to those.
For low-cost practice, I load Bengal Bullets’ hard-cast .424” Jeff boolits. James at BB uses a 390grn mould for a WFNGC boolit, and they’re coated and gas-checked. I stocked up on 500 of those. Initial accuracy back in January was decent using Varget, but I’m still testing them.
With a compact Leupy 2.5x scope in Alaskan Arms QD mounts, a safari stock pak and sling, my AHR .404 rifle is right at the 10.2lb spec.
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I think Kynoch kept the loads conservative back in the day because a lot of the rifles that went to Africa were Mauser non-magnum actions. I think they did get used a lot even by game control officers and they were light rifles probably in the 8-9 lb. range. I suspect those loads were probably around or under 2,000 fps. It still took more of a man than me to take that recoil.
On a similar subject I am a big fan of the 40s with a 450-400 3-1/4 nitro in my collection and a between the wars 11.2x72 Mauser. That Mauser only weighs about 8 lbs. and with loads similar to the 404 kicks like the devil.