375 h&h load advice

[BULLBLASTER]

I am starting to get frustrated loading for my 375. I am using 300 grain hornady btsp bullets with imr4350 and gm215m primers in remington brass. I've tried many powder charges and seating depths amd cant seem to get anywhere. So far my best is at 71 grains of powder and overall length of 3.580 next im going to try Same powder charge and 3.575 and 3.570 for length.
I know theres a few guys on here with Holland's and was just looking for any input. Im not opposed to trying a diffe re powder so long as I can find it.
Thanks
 

[Biggerhammer]

You may consider dropping your bullet weight to a 260gr Accubond or a 270gr Hornady Spire Point. Gain a little velocity. Velocity makes up for mass  to a certain point when it comes to the H&H. Especially when it's being used on game this isn't going to stomp you into a mud hole.  RL-15 will get you your speed and accuracy.

[yorketransport]

Varget was my favorite powder in the H&H. Seating depth never seemed to matter for me. Just crimp the bullets in the groove and have at it.

Andrew

[BULLBLASTER]

i made some progress tonight. got to 1 moa at one hundred yards. powder charge is still a bit low. I am going to work up next time out and see if the accuracy remains.
ill try with what I have for now since I am getting better results.
ill keep varget in mind if I need to change it up.
I do have some factory load 260 partitions that shoot amazing, but I want the big pills! big guns and big bullets are too much fun!
there is such a difference smacking steel even between the 260 partition and the 300 hornady.
im not looking for a super flat trajectory with this, I just want a short to mid range (out to 350 or so yards) hammer.

would adding a crimp make much difference? this far I have not been crimping. it seems like this particular set up is very particular with seating depth.

[yorketransport]

The crimp could make the difference. It will make all of your loads more consistent. The H&H has a pretty thin neck, so neck tension can vary quite a bit. The crimp will help make them more uniform.

Andrew

[Biggerhammer]

I always crimped the 300gr Hornady BTSP's. I have never shot any without a crimp.

[BULLBLASTER]

The crimp could make the difference. It will make all of your loads more consistent. The H&H has a pretty thin neck, so neck tension can vary quite a bit. The crimp will help make them more uniform.

Andrew

would I need a factory crimp die? or can I set the bullet seating die to crimp at the very end? set the die a smidge lower?
EDIT... just ordered a crimp die. itll be here Thursday. now I get to start all over with development. thanks hammer and York! im glad I can share your love for completely overkill 

[Biggerhammer]

The .375 H&H is classy smooth horsepower. I'm fond of super magnums but there is a magic in the .375 H&H and the 7x57.

[j_h_nimrod]

I love my H&H and have carried it all over hell-an-gone. Had my best luck with crimped 270gr bullets, as others have already posted. Been awhile since I loaded for it so do not remember the best powder off the top of my head. RL15 was always good from my recollection though.

[birddogdad]

77.5 grains of Win. 760 with either a 300 Gr. Sierra Game King (long range) or 300 Gr. Hornady FMJ for woods.  For then game king OAL is 3.270".  With the FMJ seat to cannelure.  I prefer the Federal 215 primer.

one of the most accurate down range rifles i own is my H&H with these loads. The FMJ is awesome in the woods, have jumped bulls, taken through THICK brush with this load no problem...

[Bwana Bob]

I loaded my 375 H&H with 270gr Barnes TS for my buffalo hunt in Africa. I used the 270gr Hornady for practice. Both shot under an inch with IMR 4064 and RL 15. I used standard LR primers.

[birddogdad]

as we dont know your application, i gave brush and open load data. lots of guys use bullets in the 270gr class here but i have always been of the thought that if i am "going big" with big bore, then "go big" with bullets too... they are very accurate, to distances this caliber was designed for, if you are going to reach out, then weight and BC will play into holdover issues. The brush load FMJ is wonderful, I pay no attention to brush thumb thickness down, fir branches or reprod vine maple... no deflection or breakup to speak of.

one other thing, if you are having accuracy issues, start with new brass and and only fire through YOUR rifle, dont pickup and size, there may be slight issue with your dies or you have a rifle that doesnt like other fired brass.... I have only had this occur once with my pair of weatherby 340's, my crown, which is made "tighter" would hang a brass from the lower grade model. I have to segregate brass, kind of a pain in myass but.....

[yorketransport]

77.5 grains of Win. 760 with either a 300 Gr. Sierra Game King (long range) or 300 Gr. Hornady FMJ for woods.  For then game king OAL is 3.270".  With the FMJ seat to cannelure.  I prefer the Federal 215 primer.

one of the most accurate down range rifles i own is my H&H with these loads. The FMJ is awesome in the woods, have jumped bulls, taken through THICK brush with this load no problem...

I have to admit that I cringe when I read something like this. The brush busting bit has been beaten to death before, but the FMJ is just not a very good hunting bullet. There are so many expanding bullets out there which will do a better job.

Andrew

[birddogdad]

77.5 grains of Win. 760 with either a 300 Gr. Sierra Game King (long range) or 300 Gr. Hornady FMJ for woods.  For then game king OAL is 3.270".  With the FMJ seat to cannelure.  I prefer the Federal 215 primer.

one of the most accurate down range rifles i own is my H&H with these loads. The FMJ is awesome in the woods, have jumped bulls, taken through THICK brush with this load no problem...

I have to admit that I cringe when I read something like this. The brush busting bit has been beaten to death before, but the FMJ is just not a very good hunting bullet. There are so many expanding bullets out there which will do a better job.

if you have never used a FMJ in this scenario, don't cringe.. they have a specific function, and frankly have never EVER let me down. A thumb size hole is plenty of expansion for any North American Animal and meat damage is minimal at all angles, even strait away... Also , goes without saying not just spraying and praying... expansion at point blank with a 375 will definitely allow you to pack lighter leaving behind a lot of destroyed meat....

you probably wont like my cast bullet 45-70 brush deer load stories then either... .. 

Andrew

[Biggerhammer]

A heavy .375 Solid through a elk at any angle is going to cut him down.