300 Accubond in the 375 H&H

A

Alderman

Handloader
Apr 5, 2014
1,271
673
Anybody shooting any of these.
Interested in successful load data before I start.
I have Reloader 15 & 16
IMR 4350 & 4831.
I also have a pound of 4451.
 
Alderman":1r8kon5z said:
Anybody shooting any of these.
Interested in successful load data before I start.
I have Reloader 15 & 16
IMR 4350 & 4831.
I also have a pound of 4451.
Click to expand...

I wish I could help you, but I load the 260gr AB's in my 375 H&H, they work great!

Lou
 
Alderman":2b9u9k2q said:
Anybody shooting any of these.
Interested in successful load data before I start.
I have Reloader 15 & 16
IMR 4350 & 4831.
I also have a pound of 4451.
Click to expand...

Never ran this bullet, but maybe these will help a little.

Cartridge : .375 H.& H. Mag.
Bullet : .375, 300, Nosler AccuBond 53662
Useable Case Capaci: 74.134 grain H2O = 4.813 cm³
Cartridge O.A.L. L6: 3.600 inch = 91.44 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Alliant Reloder-15

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% 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

-20.0 78 53.20 2108 2960 33470 6681 95.7 1.602
-18.0 80 54.53 2155 3095 35602 6851 96.5 1.560
-16.0 82 55.86 2203 3232 37860 7013 97.2 1.516
-14.0 84 57.19 2250 3372 40252 7167 97.8 1.474
-12.0 86 58.52 2297 3514 42786 7312 98.4 1.432
-10.0 88 59.85 2343 3657 45472 7448 98.8 1.393
-08.0 90 61.18 2389 3803 48318 7573 99.2 1.355
-06.0 91 62.51 2435 3950 51335 7688 99.5 1.318
-04.0 93 63.84 2481 4099 54535 7792 99.8 1.283 ! Near Maximum !
-02.0 95 65.17 2526 4249 57930 7884 99.9 1.249 ! Near Maximum !
+00.0 97 66.50 2570 4401 61535 7966 100.0 1.217 ! Near Maximum !
+02.0 99 67.83 2615 4554 65365 8036 100.0 1.185 !DANGEROUS LOAD-DO NOT USE!
+04.0 101 69.16 2658 4708 69436 8104 100.0 1.155 !DANGEROUS LOAD-DO NOT USE!
+06.0 103 70.49 2702 4863 73767 8170 100.0 1.126 !DANGEROUS LOAD-DO NOT USE!
+08.0 105 71.82 2745 5020 78380 8233 100.0 1.098 !DANGEROUS LOAD-DO NOT USE!
+10.0 107 73.15 2788 5178 83298 8294 100.0 1.071 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 97 66.50 2654 4691 72667 7637 100.0 1.140 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 97 66.50 2445 3983 50586 8116 97.5 1.320



Cartridge : .375 H.& H. Mag.
Bullet : .375, 300, Nosler AccuBond 53662
Useable Case Capaci: 74.134 grain H2O = 4.813 cm³
Cartridge O.A.L. L6: 3.600 inch = 91.44 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : IMR 4350

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% 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

-20.0 86 58.40 2063 2834 32308 6495 89.3 1.606
-18.0 88 59.86 2112 2973 34477 6697 90.5 1.562
-16.0 90 61.32 2162 3115 36793 6893 91.6 1.519
-14.0 92 62.78 2213 3261 39269 7083 92.6 1.474
-12.0 95 64.24 2263 3410 41917 7266 93.6 1.430
-10.0 97 65.70 2313 3563 44750 7441 94.5 1.388
-08.0 99 67.16 2363 3720 47788 7609 95.4 1.348
-06.0 101 68.62 2413 3879 51032 7768 96.2 1.309
-04.0 103 70.08 2463 4042 54539 7917 96.9 1.272 ! Near Maximum !
-02.0 105 71.54 2513 4208 58278 8056 97.5 1.235 ! Near Maximum !
+00.0 107 73.00 2563 4378 62275 8184 98.1 1.200 !DANGEROUS LOAD-DO NOT USE!
+02.0 110 74.46 2613 4550 66574 8301 98.6 1.167 !DANGEROUS LOAD-DO NOT USE!
+04.0 112 75.92 2663 4726 71203 8405 99.0 1.134 !DANGEROUS LOAD-DO NOT USE!
+06.0 114 77.38 2713 4904 76197 8497 99.3 1.103 !DANGEROUS LOAD-DO NOT USE!
+08.0 116 78.84 2763 5086 81593 8576 99.6 1.072 !DANGEROUS LOAD-DO NOT USE!
+10.0 118 80.30 2813 5270 87436 8640 99.8 1.043 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 107 73.00 2672 4756 73828 8007 100.0 1.122 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 107 73.00 2417 3891 51139 7977 92.4 1.304


Cartridge : .375 H.& H. Mag.
Bullet : .375, 300, Nosler AccuBond 53662
Useable Case Capaci: 74.134 grain H2O = 4.813 cm³
Cartridge O.A.L. L6: 3.600 inch = 91.44 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : IMR 4831

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% 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

-20.0 90 59.20 2091 2912 30933 6879 93.8 1.631
-18.0 93 60.68 2143 3059 33143 7070 94.8 1.586
-16.0 95 62.16 2195 3209 35523 7252 95.8 1.541
-14.0 97 63.64 2247 3363 38087 7423 96.6 1.496
-12.0 100 65.12 2299 3519 40849 7582 97.4 1.449
-10.0 102 66.60 2350 3680 43799 7729 98.1 1.404
-08.0 104 68.08 2402 3843 46951 7864 98.6 1.361
-06.0 106 69.56 2453 4009 50342 7984 99.1 1.320
-04.0 109 71.04 2504 4177 53994 8090 99.5 1.280 ! Near Maximum !
-02.0 111 72.52 2555 4349 57932 8181 99.8 1.241 ! Near Maximum !
+00.0 113 74.00 2606 4523 62182 8256 99.9 1.204 !DANGEROUS LOAD-DO NOT USE!
+02.0 115 75.48 2656 4699 66777 8315 100.0 1.168 !DANGEROUS LOAD-DO NOT USE!
+04.0 118 76.96 2706 4877 71751 8361 100.0 1.134 !DANGEROUS LOAD-DO NOT USE!
+06.0 120 78.44 2756 5058 77147 8403 100.0 1.100 !DANGEROUS LOAD-DO NOT USE!
+08.0 122 79.92 2805 5241 83012 8441 100.0 1.068 !DANGEROUS LOAD-DO NOT USE!
+10.0 124 81.40 2854 5426 89400 8475 100.0 1.037 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 113 74.00 2706 4877 75747 7859 100.0 1.118 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 113 74.00 2455 4016 49159 8368 96.4 1.321



Cartridge : .375 H.& H. Mag.
Bullet : .375, 300, Nosler AccuBond 53662
Useable Case Capaci: 74.134 grain H2O = 4.813 cm³
Cartridge O.A.L. L6: 3.600 inch = 91.44 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Alliant Reloder-17

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% 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

-20.0 83 59.20 2149 3078 31523 7368 96.0 1.592
-18.0 85 60.68 2203 3233 33696 7561 96.9 1.547
-16.0 87 62.16 2256 3391 36022 7741 97.8 1.504
-14.0 89 63.64 2309 3553 38519 7905 98.4 1.458
-12.0 91 65.12 2362 3718 41199 8054 99.0 1.414
-10.0 93 66.60 2415 3885 44078 8185 99.5 1.370
-08.0 95 68.08 2467 4055 47175 8299 99.8 1.329
-06.0 97 69.56 2519 4228 50508 8393 99.9 1.289
-04.0 99 71.04 2571 4403 54102 8469 100.0 1.250 ! Near Maximum !
-02.0 101 72.52 2622 4579 57980 8535 100.0 1.213 ! Near Maximum !
+00.0 103 74.00 2673 4758 62170 8598 100.0 1.177 !DANGEROUS LOAD-DO NOT USE!
+02.0 105 75.48 2723 4938 66711 8657 100.0 1.142 !DANGEROUS LOAD-DO NOT USE!
+04.0 107 76.96 2773 5121 71632 8713 100.0 1.109 !DANGEROUS LOAD-DO NOT USE!
+06.0 109 78.44 2822 5306 76980 8766 100.0 1.077 !DANGEROUS LOAD-DO NOT USE!
+08.0 112 79.92 2872 5494 82800 8815 100.0 1.045 !DANGEROUS LOAD-DO NOT USE!
+10.0 114 81.40 2921 5685 89152 8860 100.0 1.015 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 103 74.00 2769 5106 75963 8214 100.0 1.094 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 103 74.00 2523 4240 50262 8932 98.3 1.287
 
Typically with 300 grain bullets, and I have NOT tried the 300 gr AccuBond, I'm using a middlin' charge of H4350. It usually produces around 2500 - 2550 fps with roughly MOA accuracy.

I don't recall using any of the powders you've listed, with the 300, but based on my experience with H4350, I'd be inclined to try IMR 4350 early on.

*May have tried some RL-15 with the 300's at some point. I'll check. It works GREAT with the lighter 260-270 gr bullets.

Guy
 
BTW, I think Gerry has some experience afield with the 300 gr AccuBond. Possibly on grizzly and/or moose... I don't remember for sure. He was using a .375 Ruger, but performance is similar.

Might want to check his posts & bullet tests.

Regards, Guy
 
I used the 260 gr AccuBond mostly when I had the 375 Ruger and was pleased with how they worked. Did find a great load with the 300 gr AccuBond and ran a test though.

viewtopic.php?f=57&t=18922

I believe Rem Jim runs the 300 gr AB in his 375 H&H, he checks in here fairly often.
 
Several things REALLY impressed me about the .375 H&H when one introduced itself to me a few years back:

1. Nowhere near the recoil I'd anticipated!
2. Excellent accuracy with pretty much every bullet/load I've tried. MOA is normally not a problem.
3. Kills bears real dead, real fast.

No wonder I like it!
 
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