This is one of my favorite calibers together with the 7x64mm Brenneke, .404 Jeffery, .458 Lott, .470 Nitro Express, .500 Jeffery, .416 Remington Magnum, 9.3x62mm Mauser, and .300 Norma Magnum.
I Like your videos. One reason for kynoch quoting velocities at 2150fps for most of the nitro express cartridges could be that there test barrels were 28 inches or maybe 30 inches long. Just a thought.
Hi Eddie, I checked Graeme Wright's book, Shooting the British Double Rifle and you had it spot on, the proofing barrel used to test original Kynoch ammo in 450/400 3" was indeed 30 " long !!
Even to this day many test barrels are long and have the ability to produce magical velocities that are unattainable in hunting rifles. Buffalo Bore ammunition states that there loads are tested in actual common firearms so the velocities they publish is what your gun will shoot. Also, so many things happen when you fire a gun. Flex, barrel vibration, different pressure spikes with different powder and components. We can't get cordite to check things out and chronograph. So so many different factors. I do know that cordite burned very hot and was very sensitive to temperature. Some makers for a short time made doubles to shoot 4 inches apart in England so in tropical heat they would shoot 2 inches apart. Kynoch also introduced a tropical load . I'm believe in 1920. Don't on the date. It had a reduced charge to keep the gun regulated in England at less than 2 inch groups from cross firing in tropical heat. None of this lasted long as powder advanced and cordite was phased out.
I don't mean to gone on and on about this. But if you have to wonder if say a 450/400 has always shot at around 1950fps. That puts muzzle energy down to about 3300. The .470 about 4200 and so on. Is that enough? If our assumptions are correct that they always shot at lower velocities than Kynoch quoted then yes. It's enough now and it was enough over a hundred years ago. I think you and I both know not to get hung up on velocities and other numbers. If you can get the barrels to shoot a good group the rifle will get the job done. Keep up the excellent videos.
This is one of my favorite calibers together with the 7x64mm Brenneke, .404 Jeffery, .458 Lott, .470 Nitro Express, .500 Jeffery, .416 Remington Magnum, 9.3x62mm Mauser, and .300 Norma Magnum.
I have just joined this channel and find the approach fresh and fascinating! Thank you so much for inviting us into your world!
You are most welcome I hope to add some hunting videos during the winter
Hello from England, just subbed. A very interesting channel..
Thank you very much !
I Like your videos. One reason for kynoch quoting velocities at 2150fps for most of the nitro express cartridges could be that there test barrels were 28 inches or maybe 30 inches long. Just a thought.
very valid point !
Hi Eddie, I checked Graeme Wright's book, Shooting the British Double Rifle and you had it spot on, the proofing barrel used to test original Kynoch ammo in 450/400 3" was indeed 30 " long !!
Even to this day many test barrels are long and have the ability to produce magical velocities that are unattainable in hunting rifles. Buffalo Bore ammunition states that there loads are tested in actual common firearms so the velocities they publish is what your gun will shoot. Also, so many things happen when you fire a gun. Flex, barrel vibration, different pressure spikes with different powder and components. We can't get cordite to check things out and chronograph. So so many different factors. I do know that cordite burned very hot and was very sensitive to temperature. Some makers for a short time made doubles to shoot 4 inches apart in England so in tropical heat they would shoot 2 inches apart. Kynoch also introduced a tropical load . I'm believe in 1920. Don't on the date. It had a reduced charge to keep the gun regulated in England at less than 2 inch groups from cross firing in tropical heat. None of this lasted long as powder advanced and cordite was phased out.
@@eddiehayes2388 Thanks for the info- much appreciated !
I don't mean to gone on and on about this. But if you have to wonder if say a 450/400 has always shot at around 1950fps. That puts muzzle energy down to about 3300. The .470 about 4200 and so on. Is that enough? If our assumptions are correct that they always shot at lower velocities than Kynoch quoted then yes. It's enough now and it was enough over a hundred years ago. I think you and I both know not to get hung up on velocities and other numbers. If you can get the barrels to shoot a good group the rifle will get the job done. Keep up the excellent videos.
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