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Joined: Feb 2012
Posts: 60
Campfire Greenhorn
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OP
Campfire Greenhorn
Joined: Feb 2012
Posts: 60 |
Hi there. My goal is to develop a .375 H&H load that will push a 260 grain Nosler Accubond to 3000 fps at the muzzle. Has anyone with a chronograph worked up a similar load? This is my first adventure in pushing a load. Highest book load uses Reloder 15 and 2790 fps.
Thanks
Robert Blum
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Joined: Nov 2006
Posts: 901
Campfire Regular
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Campfire Regular
Joined: Nov 2006
Posts: 901 |
Punch it out to 375 Weatherby.
Winchester rifles and Swarovski scopes.
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Joined: Apr 2017
Posts: 3,166
Campfire Tracker
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Campfire Tracker
Joined: Apr 2017
Posts: 3,166 |
I believe you will need a 378 Weatherby. You will be about 500 fps short of your goal with a 375 H&H and a good 100+ fps short with a 375 Weatherby.
You are looking to produce 20% more velocity than the standard so one would need to boost pressures 4% for every 1% increase in velocity per Mule Deer's rule. I doubt the brass can handle that kind of stress and I guess it would be pretty hard on the rifle too. I've shot a 378 Weatherby and I did not find it to be a pleasant experience. And it was a good 100 fps slower than the OP's desired velocity.
Last edited by woodmaster81; 06/21/20.
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Joined: Jul 2005
Posts: 23,499
Campfire Ranger
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Campfire Ranger
Joined: Jul 2005
Posts: 23,499 |
Rl17 start out with 74-75 work up carefully
Then STFU. The rest of your statement is superflous bullshit with no real bearing on this discussion other than to massage your own ego. Suckin' on my titties like you wanted me.
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Joined: Sep 2009
Posts: 1,290
Campfire Regular
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Campfire Regular
Joined: Sep 2009
Posts: 1,290 |
I doubt it's possible without using RED HOT loads. I'm battling to get 3000fps out of my 375 Rem Ultra Mag when using 260gn Accubonds. My rifle has a 25" bbl.
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Joined: Apr 2005
Posts: 30,910
Campfire 'Bwana
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Campfire 'Bwana
Joined: Apr 2005
Posts: 30,910 |
Hi there. My goal is to develop a .375 H&H load that will push a 260 grain Nosler Accubond to 3000 fps at the muzzle. Has anyone with a chronograph worked up a similar load? This is my first adventure in pushing a load. Highest book load uses Reloder 15 and 2790 fps.
Thanks
Robert Blum
You can't get there safely
I got banned on another web site for a debate that happened on this site. That's a first
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Joined: Sep 2010
Posts: 3,998
Campfire Tracker
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Campfire Tracker
Joined: Sep 2010
Posts: 3,998 |
I am continually astounded at how quickly people make up their minds on little evidence or none at all.
Jack O'Connor
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Joined: May 2009
Posts: 17,262
Campfire Ranger
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Campfire Ranger
Joined: May 2009
Posts: 17,262 |
I believe you will need a 378 Weatherby. Pretty much. Maybe 2750 fps with sane pressures.......maybe
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Joined: Nov 2011
Posts: 30,964
Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2011
Posts: 30,964 |
Easy Peasy. You just need a case full of RL-17 and a 30" barrel. If you don't have a 30" barrel, don't even try:
Cartridge : .375 H.& H. Mag.
Bullet : .375, 260, Nosler AccuBond 54413
Useable Case Capaci: 77.767 grain H2O = 5.049 cm³
Cartridge O.A.L. L6: 3.600 inch = 91.44 mm
Barrel Length : 30.0 inch = 762.0 mm
Powder : Alliant Reloder-17 *T
Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.625% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !
Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms
-06.3 100 75.00 2862 4729 51334 6789 100.0 1.373
-05.6 100 75.50 2880 4789 52487 6804 100.0 1.360
-05.0 101 76.00 2898 4849 53670 6818 100.0 1.348 ! Near Maximum !
-04.4 102 76.50 2916 4909 54882 6832 100.0 1.335 ! Near Maximum !
-03.8 102 77.00 2934 4969 56127 6845 100.0 1.322 ! Near Maximum !
-03.1 103 77.50 2952 5030 57402 6858 100.0 1.310 ! Near Maximum !
-02.5 104 78.00 2969 5091 58710 6871 100.0 1.298 ! Near Maximum !
-01.9 104 78.50 2987 5152 60051 6883 100.0 1.286 ! Near Maximum !
-01.3 105 79.00 3005 5213 61430 6895 100.0 1.274 ! Near Maximum !
-00.6 106 79.50 3023 5274 62846 6907 100.0 1.262 !DANGEROUS LOAD-DO NOT USE!
+00.0 106 80.00 3040 5336 64295 6919 100.0 1.250 !DANGEROUS LOAD-DO NOT USE!
+00.6 107 80.50 3058 5397 65788 6930 100.0 1.239 !DANGEROUS LOAD-DO NOT USE!
+01.3 108 81.00 3075 5459 67319 6941 100.0 1.227 !DANGEROUS LOAD-DO NOT USE!
+01.9 108 81.50 3093 5521 68891 6952 100.0 1.216 !DANGEROUS LOAD-DO NOT USE!
+02.5 109 82.00 3110 5584 70501 6963 100.0 1.205 !DANGEROUS LOAD-DO NOT USE!
+03.1 110 82.50 3127 5646 72167 6973 100.0 1.194 !DANGEROUS LOAD-DO NOT USE!
Results caused by ± 3% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 3% relative to nominal value:
+Ba 106 80.00 3076 5463 68353 6807 100.0 1.222 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 3% relative to nominal value:
-Ba 106 80.00 2999 5191 60413 7046 100.0 1.281 ! Near Maximum !
You didn't use logic or reason to get into this opinion, I cannot use logic or reason to get you out of it.
You cannot over estimate the unimportance of nearly everything. John Maxwell
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Joined: Mar 2007
Posts: 1,402
Campfire Regular
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Campfire Regular
Joined: Mar 2007
Posts: 1,402 |
I get there with my 375 RUM. I get 3000 fps with 270 gr. Speer and 97 gr. of Alliant R-23. Factory 26" barrel. I would not even try with a 375 H&H.
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Joined: May 2009
Posts: 17,262
Campfire Ranger
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Campfire Ranger
Joined: May 2009
Posts: 17,262 |
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Joined: May 2014
Posts: 10,417
Campfire Outfitter
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Campfire Outfitter
Joined: May 2014
Posts: 10,417 |
I’ve seen printed loads for the 375 Weatherby 260 grain at 2900fps.
I have a 375 H&H AI which has a small amount of case capacity greater than the Weatherby, I would not likely try to get to 3,000 FPS with my 26” barreled rifle.
I can only imagine what pressure you’d need to get to 3,000 FPS and with a 260 grain bullet out of a 375 H&H.
I would not do it and I’d not recommend it!
I prefer classic.
Semper Fi
I used to run with the hare. Now I'm envious of the tortoise and I do my own stunts but rarely intentionally
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Joined: Feb 2009
Posts: 1,799
Campfire Regular
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Campfire Regular
Joined: Feb 2009
Posts: 1,799 |
Like others have posted, I don't think you can safely get 3000 fps with a 260 grain bullet from a standard .375 H&H.
The best that I've got from my 26" barreled .375 RUM is 3043 fps with 270 grain TSX bullets and 2898 fps with 300 grain Partitions.
SAVE 200 ELK, KILL A WOLF
NRA Endowment Life Member
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Joined: Feb 2009
Posts: 290
Campfire Member
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Campfire Member
Joined: Feb 2009
Posts: 290 |
I have a 24” barreled 375 Bee, I can push a 260gr AB to 3000fps...but the brass is toast after 2 firings.
If you think you can push this velocity from a H&H case...expect a stuck case, case head flow into the bolt face and a mallet to open it, if it opens at all.
Cheers.
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Joined: Sep 2010
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Campfire 'Bwana
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Campfire 'Bwana
Joined: Sep 2010
Posts: 31,426 |
"I can't be canceled, because, I don't give a fuuck!"
--- Kid Rock 2022
Holocaust Deniers, the ultimate perverted dipchits: Bristoe, TheRealHawkeye, stophel, Ghostinthemachine, anyone else?
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Campfire Tracker
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Campfire Tracker
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Never take life to seriously, after all ,no one gets out of it alive.
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