|
|
Joined: Nov 2010
Posts: 37,008
Campfire 'Bwana
|
Campfire 'Bwana
Joined: Nov 2010
Posts: 37,008 |
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 Hmmm... Lots of fluff? More bun than beef? Ya reckon Double Tap .375 H&H 260 NAB ammo, reportedly at 3K, may be similar? DF
|
|
|
|
|
Joined: Jan 2017
Posts: 8,851
Campfire Outfitter
|
|
Campfire Outfitter
Joined: Jan 2017
Posts: 8,851 |
Sounds like a classic case of BS advertising to me. Long before the super bullets and wonder loads appeared the standard 375 h&h loads you can buy over the counter in 270 gr& 300 gr were getting the job done in fine style or we all would have heard about it. What 30-40 yd shot from leopard in a tree to the blind? A lot of guys who go to Africa leave their remaining ammo as a partial tip for the guide ,is that what he really wants? I think standard pressure accurate loads would serve your needs much more in Africa than some stoked to the max stuff for a 30-40 to 250 yd shot .Max reliability and safe pressure should be ctr in your thinking here. Just the way I see it ,no disrespect intended. MB
" Cheapest velocity in the world comes from a long barrel and I sure do like them. MB "
|
|
|
|
|
Joined: Apr 2005
Posts: 30,867
Campfire 'Bwana
|
Campfire 'Bwana
Joined: Apr 2005
Posts: 30,867 |
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 Hmmm... Lots of fluff? More bun than beef? Ya reckon Double Tap .375 H&H 260 NAB ammo, reportedly at 3K, may be similar? DF I've never tried any 375 ammo from Double Tap, but I've tried several of their handgun rounds and unlike Buffalo Bore and Underwood the Double Tap rarely equals their claimed velocity
I got banned on another web site for a debate that happened on this site. That's a first
|
|
|
|
|
Joined: Nov 2010
Posts: 37,008
Campfire 'Bwana
|
|
Campfire 'Bwana
Joined: Nov 2010
Posts: 37,008 |
Sounds like a classic case of BS advertising to me. Long before the super bullets and wonder loads appeared the standard 375 h&h loads you can buy over the counter in 270 gr& 300 gr were getting the job done in fine style or we all would have heard about it. What 30-40 yd shot from leopard in a tree to the blind? A lot of guys who go to Africa leave their remaining ammo as a partial tip for the guide ,is that what he really wants? I think standard pressure accurate loads would serve your needs much more in Africa than some stoked to the max stuff for a 30-40 to 250 yd shot .Max reliability and safe pressure should be ctr in your thinking here. Just the way I see it ,no disrespect intended. MB I'd say there have been a bunch of leopards zapped with the .375 H&H long before Double Tap existed... I've read there is a South African company making rounds especially suited for big cats. I don't know the specifics. May be something to check into. DF
|
|
|
|
|
Joined: Oct 2008
Posts: 7,263
Campfire Tracker
|
Campfire Tracker
Joined: Oct 2008
Posts: 7,263 |
Just to repeat what others have said down loading is a good idea for hot climates. I worked up a max load for the 250 gr. Barnes with R15 and then loaded some 260 BT with the same load. They shot fine in cool weather but would be hard to extract in 90 degree heat. Once there was published data available for the now 260 gr. Accubond I found out I was three grains over Noslers max load. Same issue with 250 gr. Kodiaks they took the same max load as the Nosler not the Berger.
The Accubond or the Partition both are excellent for Leopard as the expand easily. The Ballistic tip and ABLR also would qualify.
"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli
|
|
|
|
|
Joined: Jan 2005
Posts: 3,916
Campfire Tracker
|
|
Campfire Tracker
Joined: Jan 2005
Posts: 3,916 |
The Nosler 260 should make a good leopard bullet with almost any loading.
And I have heard reliable reports of brass failures with DT rifle ammo ?
Phil Shoemaker Alaska Master Guide, Alaska Hunter Ed Instructor FAA Master pilot www.grizzlyskinsofalaska.comAnyone who claims the 30-06 is not effective has either not used one, or else is unwittingly commenting on their marksmanship.
|
|
|
|
|
Joined: Feb 2012
Posts: 60
Campfire Greenhorn
|
|
OP
Campfire Greenhorn
Joined: Feb 2012
Posts: 60 |
I would like to contact anyone who had a Brass failure with DoubleTap ammunition. Any chance you can dig out the contact info and PM me?
|
|
|
|
|
Joined: Dec 2002
Posts: 1,951
Campfire Regular
|
|
Campfire Regular
Joined: Dec 2002
Posts: 1,951 |
No experience with any of the big cats, Lion, I could see the merit of a 375H&H. Leopard? Is it a requirement? Their not that big. To my way of thinking, a 338 of any flavor and a 210 -225 grain bullet would be perfect. Am I missing something?
|
|
|
|
|
Joined: Aug 2009
Posts: 95,785
Campfire Oracle
|
|
Campfire Oracle
Joined: Aug 2009
Posts: 95,785 |
Some countries require a minimum of .375 H&H for dangerous game.
Life Member SCI
Life Member DSC
Member New Mexico Shooting Sports Association
Take your responsibilities seriously, never yourself-Ken Howell
Proper bullet placement + sufficient penetration = quick, clean kill. Finn Aagard
Ken
|
|
|
|
|
Joined: Dec 2002
Posts: 1,951
Campfire Regular
|
|
Campfire Regular
Joined: Dec 2002
Posts: 1,951 |
Some countries require a minimum of .375 H&H for dangerous game.
Yes, I know that. I guess I should have been more clear. If you could kill one cleanly will a 338, or lots of other rounds, I’d be more concerned about practicing with my rifle than bullet choices out of a 375 H&H.
|
|
|
|
|
Joined: Feb 2012
Posts: 60
Campfire Greenhorn
|
|
OP
Campfire Greenhorn
Joined: Feb 2012
Posts: 60 |
Anyway, this post seems to be wandering. Thank you all for your opinions on reloading a .260 gr accubond t375 H&H to 3000 FPS. It doesn’t sound possible.
If anyone can get me in connect with someone who has had a brass failure, or incident failure when using DoubleTap ammunition, I would appreciate getting that contact so I can hear it from the horses mouth.
|
|
|
|
|
Joined: Apr 2006
Posts: 7,152
Campfire Tracker
|
|
Campfire Tracker
Joined: Apr 2006
Posts: 7,152 |
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. Double Tap doesn't list the 375 H&H but does list the .375 RUM and lists it getting 3065 fps from a 26" barrel. Maybe that is what your PH saw. https://doubletapammo.com/collectio...ducts/375-rum-260gr-nosler-accubond-20rd
|
|
|
|
|
Joined: Nov 2010
Posts: 37,008
Campfire 'Bwana
|
|
Campfire 'Bwana
Joined: Nov 2010
Posts: 37,008 |
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. Double Tap doesn't list the 375 H&H but does list the .375 RUM and lists it getting 3065 fps from a 26" barrel. Maybe that is what your PH saw. https://doubletapammo.com/collectio...ducts/375-rum-260gr-nosler-accubond-20rdNow, that makes a lot more sense... I wonder what goes thru a PH's mind when he sees a client unsheath a mega magnum that looks store bought new...?? I'm sure a 260 NAB at 3K is effective...  I'll stick with my .375 H&H... DF
|
|
|
|
|
Joined: Jul 2002
Posts: 4,211
Campfire Tracker
|
|
Campfire Tracker
Joined: Jul 2002
Posts: 4,211 |
JWP475 You choreographed them? What dance step were they doing?????? Or did you CHRONOGRAPH them? I laughed for two minutes solid after reading that. Didn't have any coffee to spew. As you can see I'm easily entertained. I read this because I have a 376 Steyr and cannot possibly get these velocities. Maybe when I grow up I can do this. But I bought seven boxes of 260 gr and three boxes of 300 gr Partitions so there is no chance of my buying another 375 bullet for a while. Good luck and be safe to the OP. Be Well, Rustyzipper.
Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy. Its inherent virtue is the equal sharing of misery. Winston Churchill.
|
|
|
|
|
Joined: Sep 2017
Posts: 500
Campfire Regular
|
|
Campfire Regular
Joined: Sep 2017
Posts: 500 |
Double Tap lists a 375 H&H with 260 Nosler at 2900 FPS MV. https://doubletapammo.com/collections/all/products/375-h-h-260gr-nosler-accubond-20rdsI’d believe it if I saw it over a chrono. My experience with DT has been okay, but at least their pistol ammo has slightly wishful reported MVs, at least IME. I have zero experience hunting big cats, but I wonder if 100 to 200 FPS MV would really matter on a leopard? A 260 gr Accubonds at say 2700 FPS is nothing to dismiss.
|
|
|
|
|
Joined: Apr 2005
Posts: 30,867
Campfire 'Bwana
|
|
Campfire 'Bwana
Joined: Apr 2005
Posts: 30,867 |
JWP475 You choreographed them? What dance step were they doing?????? Or did you CHRONOGRAPH them? I laughed for two minutes solid after reading that. Didn't have any coffee to spew. As you can see I'm easily entertained. I read this because I have a 376 Steyr and cannot possibly get these velocities. Maybe when I grow up I can do this. But I bought seven boxes of 260 gr and three boxes of 300 gr Partitions so there is no chance of my buying another 375 bullet for a while. Good luck and be safe to the OP. Be Well, Rustyzipper. Of course I chronographed them how else would I have know, they didn't get the advertised velocity
I got banned on another web site for a debate that happened on this site. That's a first
|
|
|
|
|
Joined: Apr 2006
Posts: 7,152
Campfire Tracker
|
|
Campfire Tracker
Joined: Apr 2006
Posts: 7,152 |
Double Tap lists a 375 H&H with 260 Nosler at 2900 FPS MV. https://doubletapammo.com/collections/all/products/375-h-h-260gr-nosler-accubond-20rdsI’d believe it if I saw it over a chrono. My experience with DT has been okay, but at least their pistol ammo has slightly wishful reported MVs, at least IME. I have zero experience hunting big cats, but I wonder if 100 to 200 FPS MV would really matter on a leopard? A 260 gr Accubonds at say 2700 FPS is nothing to dismiss. Strange it isn't in their drop down menu of calibers.
|
|
|
|
|
574 members (1Akshooter, 007FJ, 1badf350, 12344mag, 160user, 10gaugemag, 64 invisible),
2,120
guests, and
1,309
robots. |
|
Key:
Admin,
Global Mod,
Mod
|
|
|
Forums81
Topics1,190,300
Posts18,449,017
Members73,900
| |
Most Online11,491
Jul 7th, 2023
|
|
|
|
