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PostPosted: Sun Jan 04, 2015 6:59 pm 
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Second Lieutenant
Second Lieutenant

Joined: Sun Nov 24, 2013 8:12 pm
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I have heard on a different forum (Oh the horror) that the later model Trapdoors use a heavier bullet. Has anyone heard of this. I have a 1888 model with the dreaded ramrod bayonet, or the deluxe campfire weenie cooker. Any word on this would be appreciated.

Best Regards,

Mark


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PostPosted: Sun Jan 04, 2015 10:12 pm 
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Теперь предлагаем бесплатную ежедневную маммографию!
Теперь предлагаем бесплатную ежедневную маммографию!
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Joined: Sun Aug 05, 2007 9:04 pm
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I'd be a little more concerned about bullet diameter than weight. About all I can tell you is cav carbines and long rifles had different weight bullets. SW

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PostPosted: Sun Jan 04, 2015 10:34 pm 
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Second Lieutenant
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I believe I've got a 405 grain bullet mold on the way. Shouldn't that be heavy enough?

Best Regards,

Mark

BTW, next step up is around 500 grains. Eee Gads, that sounds huge.


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PostPosted: Sun Jan 04, 2015 11:09 pm 
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Теперь предлагаем бесплатную ежедневную маммографию!
Теперь предлагаем бесплатную ежедневную маммографию!
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Joined: Sun Aug 05, 2007 9:04 pm
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Location: On the couch a lot now that I'm retired
That's my choice. Works well for 43 Dutch, too! SW

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Darkness is all around us and enemy are just beyond the perimeter.


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PostPosted: Mon Jan 05, 2015 12:10 am 
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Second Lieutenant
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That's good to hear. Now to land something in 43 Spanish.

Best Regards,
Mark


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PostPosted: Mon Jan 05, 2015 10:10 pm 
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Second Lieutenant
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Location: Ohio or Arizona it depends
As far as basic trapdoor rifle (carbine powder to ball weights were different) history goes that is correct. the .45-70 government cartridge was standardizes in 1873 as the .45-70-405 government or .45 caliber ball of 405 grain weight in front of 70 grains of powder. In 1879 ballistic tests were made and the round was changed to the .45-70-500 with the bullet weight increasing to 500 grains.
(The carbine round was a .45-55-405 with a reduced powder charge of 55 grains and the addition of wadding to fill empty space in the cartridge. This was done to try to reduce the recoil of the carbine. some time after the 1879 Sandy Hook tests the carbine round was dropped and the .45-70-500 became standard for all uses.)


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PostPosted: Thu Jan 22, 2015 11:49 am 
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Lance Cpl
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Many target shooters use the Greenhill formula for ideal starting bullet selection. You can find it online and just enter the data for your load. The standard twist for the 45.70 Trapdoor is one in 22 inches. The ideal bullet should measure 1.3 inches in length at 1400 fps. Basically this means at 1400 fps the bullet will be put to sleep much quicker than another length. By asleep I mean that there will be less wobble until the bullet stabilizes. This won't overcome a bullet out of balance, but considering a well formed bullet. This should work for ranges up to 300 yards. After that the bullet slows as does the spin and becomes unstable. 1400 fps with the 500 gr bullet isn't pushing a trapdoor. The guys that shoot 600 yards or more use bullet weights of around 550 grains with a muzzle vel. of 1600 fps. The Trapdoor generally shoots good no matter what is stuffed into it. A 430 gr bullet or 500 performs very well at 300 or less.


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PostPosted: Thu Jan 22, 2015 5:50 pm 
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Second Lieutenant
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I rarely…well never shot at over 200 yards yet, even with smokeless rounds. I think the 405 grain bullet mold I have should work good then. Now to pick a sizer….Ummh.

Best Regards,

Mark


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