Thanks... Any first hand experience? I tried it 4895 with 8mm Mauser in my 98k but I was unable to get a x39 recoil with any decent accuracy!
I've tried the reduced loads with H4895 in my 300wsm. Anything over 75% of max charge of H4895 gives me decent groups at 100m (~1MOA, using campro, so my guess is the bullet is what limits the accuracy).
The loads published by Hodgdon is 51 to 54.5 grains (velocity is 2919 to 3018fps). They suggest to use 60% or more of the max load of H4895 for reduced loads.
-If I use 34 grains of powder (62.4%), I obtain a velocity of 1951fps. The drop at 100m is insane and the group is big. I don't consider this a load that "works".
-If I use 40 grains of powder (73.4%), I obtain a velocity of 2213fps and 1.5MOA 5-shot group.
-If I use 45 grains of powder (82.7%), I obtain a velocity of 2508fps and 1.3MOA 5-shot group.
As for the recoil, it is much milder than a full load, but it's not like it became nonexistent magically. Maybe with the 303 or the 7.5x55, with light bullets like 125grn you might be able to have a low recoil and some accuracy.
I would start with the 7.5x55, 26 to 33grn of H4895. Work up the load until you get a decent accuracy or your shoulder begins to hurt. Then try the 303. Honestly I wouldn't have much hope to get a load for the 8mm mauser or the 7.62x54 that will be accurate and offer little recoil, but feel free to try.