.375 H&H questions

[crgaston]

Hi y'all,

I recently picked up a CZ 550 in .375 and like shooting it, so I'm going to have to start casting for it (ammo cost is insane for these things now). Anybody have any experience casting/loading for this round? Mold/load recommendations? Your experience and advice is appreciated.

Thanks,

Charles

[Adam10mm]

378674. Lyman's 335gr RN. Drops at .377 for 315gr with WW. I've been shooting it in my Encore pistol. Good bullet.

I also have a Lyman 375449 264gr FNGC but that's still a virgin mold. Been busy with my other stuff.

I run IMR4198 with the 335gr RN. 36gr is listed max out of the Lyman #48, 3.57" OAL. Does about 1700fps from a 24" rifle. I'm going to push it harder and see what happens. The Holland case is a big case. I run 47gr with a 350gr jacketd in 45/70 with less case capacity. No reason the Holland combo can't be pushed past 40gr. The Lee manual states the Holland's usefull case capacity it 5.61cc and the 45/70's is only 4.06cc. Almost 30% more case capacity and the case can handle almost 60K psi.

Definately slug the bore. My groove runs tight at .375 and I size to .376 with zero leading. My handloads cost 10¢/rd!!

http://img.photobucket.com/albums/v239/freakshow10mm/Boolit%20Casting/DSC03155.jpg
http://img.photobucket.com/albums/v239/freakshow10mm/Boolit%20Casting/DSC02897.jpg

[Larry Gibson]

crgaston

I use 377449, 375428 and Hornacy .375 RBs in my M70 .375 H&H.

The 377449 cast of WW + 2% tin and WQ'd over 36 gr 5744 runs 1850 fps and is very accurate and an excellent fun load. The same bullet over 49 gr 4895 with a 1 gr Dacron filler runs 2175 fps and is an excellent and accurate practice load. It also would be my choice for hunting deer/elk though I would probably not WQ the bullets.

375248 cast of range lead + 5% tin over 9.5 gr Bullseye (no filler or wad) runs 1075 fps and is an excellent plinking/small game load.

The Hornady 375 RB tumbled lightly in LLA and loaded over 4 gr of Bullseye (no wad or filler) runs 890 fps and shoots into 1 3/4" at 50 yards all day long. An excellent plinking round and just the ticket for rabbits, grouse or ptarmigan when big game hunting and wanting to add a little extra "camp meat" to the pot.

Larry Gibson

[crgaston]

Thanks, guys! Now I need to look for a 378674 mold, and some round balls.

[beagle]

Check castpics articles for one on the .375 H & H./beagle

[ozymandias]

I've only recently started loading for my M70, using the L375499GC. I've burned 48.0 gr. Varget, and 41.5 IMR 3031 so far. The Varget load seems very promising at this point.