375 H and H Reduced Loads

Could reference Lyman Cast Bullet Handbook for reduced load data. Got .375 SOCOM CamPro 250gr FMJ bullets incoming (26 cents each :)) that should work pretty good in my .375 H&H using Herco expected muzzle speed ~1600 fps. 2400 might work pretty good too. Not bad results with either for reduced loads in my .416's & .458's.
 
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A starting load should produce relatively low recoil. And you can use the H4895 60% rule, but typically H4895 is only listed for lighter bullets.
 
Mag primer and 45gr of 5744 with a 230gr bullet for about 2200-2300fps
the rest of the data hinges on just how brave you are
 
woodlotowner said:
Interesting. I have neither of the powders referenced above, but I believe I read somewhere once that one candidate reduce starting loads in the books. I believe it is not to exceed a 10% reduction from said starting loads?
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H4895 is very good for reduced loads. Hodgdons says take.max load and times it by .6 to get you reduced starting load. Imr3031 would also work.

I use both in my 43 express and I have loads of both that don't even halfway fill the case and still work fine. There are a few poders you shouldn't reduce but not any of the ones listed in this thread.

Look up cast bullet data and that will give you an idea.of what powers work well at very low charge weights. You can drop a couple gr off the start load then change out for jacketed bullet if you didn't want to shoot lead
 
I only have 270 grain jacketed and monolithic bullets at this time. The powders that I have available, that are listed in the books are; IMR-4895 (starting load MV 2,286 fps), IMR-4350 (2,293), Win 760 (2,300), H-380 (2,346), and IMR-4227 (1,846). Yes, I think I have answered my own question, having found almost a pound of IMR-4227 at the back of the lock-up. :)
 
Hi,

Accurate 5744 powder is great for reduced loads.

Now part of Hodgdon, they don't seem to publish the Accurate 5744 low recoil data on Hodgdon website. However you can find an older Accurate manual here with low recoil load data: http://pdf.textfiles.com/manuals/FIREARMS/2003guide.pdf

I use it with my .375 Ruger and 41.3 grains of Accurate 5744 powder and it yields me a 2150fps low recoil (30-06 level) round for practicing at the range. It's fairly accurate too!

Cheers
 
I referenced the Lyman Cast book through a friend, and found reduced loads using Unique that are exactly what I needed. I happen to have some Unique, but plan to use it sparingly as it is not likely replaceable in the near future. There are also Unique loads in the Lyman book for the 38-55, which is another one I like to load lightly for plinking. Look to the 3rd Edition, as the newer book(s) do not show loads data for Unique.
 
woodlotowner said:
I referenced the Lyman Cast book through a friend, and found reduced loads using Unique that are exactly what I needed. I happen to have some Unique, but plan to use it sparingly as it is not likely replaceable in the near future. There are also Unique loads in the Lyman book for the 38-55, which is another one I like to load lightly for plinking. Look to the 3rd Edition, as the newer book(s) do not show loads data for Unique.
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What was the Unique load data charge weight range?
 
I've been developing loads for my Sako .375 H&H. This is a couple test targets, shot at 100 Meters.
Left target is 300 gr. Hornady round nose soft point propelled by RL 15 at 2510 FPS. A nice, accurate full power load for anything smaller than Cape buffalo.
The right target shows three shots from a Remington 270 gr. round nose factory load which I measured with my chronograph at 2670 FPS, then four shots from a mild practise load (or hunting load equivalent to a 9.3x62). It's made with 60 gr. of IMR 3031 and ( unfortunately no longer available ) Hornady 270 RN bullet. Velocity is 2350 fps. Recoil is mild. The two 270 grain bullets show the same point of impact, and both hit just a bit higher than the 300 gr. load.
I suspect the Remington ammunition is actually loaded with Hornady bullets, they look identical. But I didn't expect that they would shoot to the same impact point with such different velocities.
 

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I run 1 grain under minimum load of H4895 and 260gr partitions, it’s a lot tamer then factory ammunition and still works wonders on moose.
 
Would think 4198 would be another good powder to try. It's one of the usual powders for reduced loads.

I have a bunch of old reloading books. Most crossover with the same powders suggested. Every once in a while you see discontinued powders, and powders you wouldn't expect with very high and low speeds. It comes down to what you define as a reduced load. If you just want an effective but not shoulder punishing game load, that's easy.

Pretty easy to reduce, say 300rum, to 300wm or even 30-06 level. Always nice to find written sources. People who blow up their rifle don't write books. Most rifles have several accuracy nodes, we always seem to try to find the one, at or near maximum.

Perhaps the most variable cartridge is 45-70. Using unique, you can go subsonic, lots of published "trapdoor" loads, others for strong modern levers(Marlin guide gun) are stout, finally loads for Siamese M98 reach to the bottom range of 458wm. Literally mice to elephant.
 
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