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I am also posting this question in the reloading forum. 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?

Thanks
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I doubt you will reach anything close to that.

If it was rechambered to .375 Weatherby Magnum it would come close.

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I doubt you will reach anything close to that.

And I doubt that you want to! Manuals are printed for a reason!


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Get a .375 RUM,it will get that 3000 fps you want with the 260 grain Accubond.


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I have a 375 H&H AI which has a marginal amount of case capacity greater than the 375 Weatherby. The rifle has a 26” barrel. If I loaded 260 grain bullets to 3,000 FPS, I believe that would be a maximum pressure load, higher pressure than what I’d normally want to load.
I’ve had a 375 H&H with a 24” barrel. I never attempted to load that 375 that warm.

Last edited by Bugger; 06/23/20.

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Forgidaboudit.


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I agree. Ain't happening. Don't even try.


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235gr Speers at 3K, yes, 300gr Partitions at 2680 and 300gr Barnes banded solids at 2700, yes, why not get a compact 2.5-10 Nightforce with clean NP-1 reticle and spin a little if you want to shoot long with a 375 H&H? 260gr Accubonds at an accurate 2850 fps would cover any stateside hunting to 500 yards.


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I ran some 260 grain BT (not Accubonds) pretty fast but found that I was loaded too hot. Dropped back to 73 grains of R-15 and every thing was good. I found even 2,800 fps was too much for the BT and urged Nosler to beef them up or get rid of them before someone poked a cape buffalo with them and the buffalo objected. Incredibly they listened and soon quit the BT in favor of the Accubond which is a great bullet.

Many people slightly under load the 375 H&H for better performance and easier shooting. Like others have mentioned if you want speed go to the 375 WM for + 150-200 fps, the 378 WM or 375 RUM for + 300 fps. but this would put things over my comfort level and the bullets may perform less well at these velocities.

If you have to exceed 3,000 fps then the 235 grain and less bullets can do this with R-15, R-16 & R-17 and other powders as well.


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I get about 2,860fps using 270gn out of my CZ 375H&H with a 26" barrel.


Originally Posted by mauserand9mm
Originally Posted by mauserand9mm
Originally Posted by Raspy
Whatever you said...everyone knows you are a lying jerk.

That's a bold assertion. Point out where you think I lied.

Well?
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in my 375 I keep it at 2750 to 2850 will still rock you but handles quite well


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No need to hot rod the 375 H&H it has been getting things done for over a hundred years with the standard velocities. Now there are lots of sleeker 375 bullets available that can coax out even more long range performance than was previously possible. For me I like the 235-270 grain range as the 300 grain loads are right at my recoil threshold for bench shooting. They aren't bad with a standing bench but sitting especially a low bench I usually only shoot a dozen or less shots at a sitting. While hunting I hardly notice the recoil.


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That is 378 Bee territory


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I'm curious. Why 3K fps?

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Glad that you asked that question.... I am planning a safari next year. The PH is an advocate for DoubleTap ammunition indicating that the best .375 H&H round for leopard is made by DoubleTap using a 260 grain Nosler Accubond bullet. He indicates that they claim 3000 FPS. I wanted to get a sense as to whether this was possible without exceeding the SAAMI specification.

I think that I now have the answer, based on the posts as well as my checking the various bullet and powder manufacturers websites. Best reported is 2790 or so using RL15. Keep in mind that I have heard that manufactures is to back off so that pressure is 2% or so below max pressure when publishing their reloading data. However, a 2% nominal decrease from maximum pressure wont amount to a cup of warm spit in terms of muzzle velocity. So unless DoubleTap has found a supply of pixie powder that generates higher velocity without increasing internal pressures over SAAMI maximum they are either stretching the claim of 3000FPS or they are overloading those rounds. If course, it is always possible that the PH misheard the claimed muzzle velocity.

I will probably avoid using their ammunition in my .375.

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Originally Posted by rblum100
Glad that you asked that question.... I am planning a safari next year. The PH is an advocate for DoubleTap ammunition indicating that the best .375 H&H round for leopard is made by DoubleTap using a 260 grain Nosler Accubond bullet. He indicates that they claim 3000 FPS. I wanted to get a sense as to whether this was possible without exceeding the SAAMI specification.

I think that I now have the answer, based on the posts as well as my checking the various bullet and powder manufacturers websites. Best reported is 3790 or so using RL15. Keep in mind that I have heard that manufactures is to back off so that pressure is 2% or so below max pressure when publishing their reloading data. However, a 2% nominal decrease from maximum pressure wont amount to a cup of warm spit in terms of muzzle velocity. So unless DoubleTap has found a supply of pixie powder that generates higher velocity without increasing internal pressures over SAAMI maximum they are either stretching the claim of 3000FPS or they are overloading those rounds. If course, it is always possible that the PH misheard the claimed muzzle velocity.

I will probably avoid using their ammunition in my .375.

I'm thinking you meant 2,790 fps with RL-15, which BTW is a respected and much used .375 H&H powder... I don't know what Double Tap is smoking, or loading, but don't think 3K is happening. Double Tap does advertise some pretty interesting data.

I'd be concerned about a "balls to the wall" load going to Africa with the potential of hot weather. Seems I remember reading reports of early .416 Rem loads with hard to open bolts in the heat due to excessive pressure. Not a good thing to happen while hunting DG.

Your PH must not be a gun nut, and reportedly a lot of them aren't.. Great hunters, maybe...

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THANKS, I edited the post correcting my typo on the speed. The PH indicated that there were few issues when a leopard was hit with that round so he likes when it is used.

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Another option is the Cutting Edge Raptor, 235 gr.which can be pushed at 3K out of a .375 H&H. It's a mono with six blades that frag on impact, the core boring on thru. I've heard that some PH's like them, not sure about on leopards. I've shot some amazing groups with my M-70 .375 H&H, no blood yet.

https://cuttingedgebullets.com/375-235gr-er-extended-range-raptor

Expensive, but compared to the cost of a hunt, not an issue IMO.

I do have Raptor experience, but with a .308. Check out this link and the review I submitted. See how that bullet fragged the hog's spine which was not in the direct line of flight. Chest shot hogs usually run, this one was DRT. https://cuttingedgebullets.com/308-135gr-er-extended-range-raptor The 235 .375 Raptor group was about that good. They are accurate. Both of these bullets are ER, good for long range. The .375 version should be good for PG.

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In my Win M-70 Transitional, 25" barrel the Barnes TTSX 250 grain bullet, using RL-15 will get very close. Oehler 35 P at 15 feet, MV = 2950 FPS. Very consistent MV, 0.5 MOA at 200 yds. Used it as my medium last September in Zim without any problems. On my 5th reload on the Winchester cases I use.

Not quite 260 grains at 3K MV, but functionally equivalent and lethal enough.


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Originally Posted by rblum100
Glad that you asked that question.... I am planning a safari next year. The PH is an advocate for DoubleTap ammunition indicating that the best .375 H&H round for leopard is made by DoubleTap using a 260 grain Nosler Accubond bullet. He indicates that they claim 3000 FPS. I wanted to get a sense as to whether this was possible without exceeding the SAAMI specification.

I think that I now have the answer, based on the posts as well as my checking the various bullet and powder manufacturers websites. Best reported is 2790 or so using RL15. Keep in mind that I have heard that manufactures is to back off so that pressure is 2% or so below max pressure when publishing their reloading data. However, a 2% nominal decrease from maximum pressure wont amount to a cup of warm spit in terms of muzzle velocity. So unless DoubleTap has found a supply of pixie powder that generates higher velocity without increasing internal pressures over SAAMI maximum they are either stretching the claim of 3000FPS or they are overloading those rounds. If course, it is always possible that the PH misheard the claimed muzzle velocity.

I will probably avoid using their ammunition in my .375.


I
I purchased some Double Tap 338 win 250 grain Partition Gold that was advertised at 2800 FPS. I choreographed them in a 29" kreiget b ass's reel and got less than 2600 FPS



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