joeb33050
08-06-2006, 07:19 AM
Mike Barrett in MN is a gun maker and bullet caster and experimenter extrodinaire. He has built a Ballard and an 1874 Sharps and an 1873 Winchester etc from scratch. He has sent me some letters and pictures and a tape of his work, and it is really impressive.
Mike is convinced that sizing too much is the cause of case failure, and oversizing is why we need to anneal case necks.
He says that no matter the bullet diameter/neck ID, after seating and removing the bullet that the neck OD will reduce only .001".
And, he has experimented and found that the force required to remove a bullet from a case is about constant, regardless of how tight the bullet is held in the case neck. So a squoze down neck on a bullet requires the same force to remove it as a slightly sized = .001" smaller neck on the same bullet.
Mike says that neck tension doesn't matter, that the case expands before the bullet leaves, and the bullet and accuracy aren't affected by neck tension.
His experimentation supports this, as I see it.
If there's somebody out there near Minneapolis Mn who could write about his work, Mike would be happy to show it and talk to you. We really need to document the work that this man has done. Any takers?
joe b.
Mike is convinced that sizing too much is the cause of case failure, and oversizing is why we need to anneal case necks.
He says that no matter the bullet diameter/neck ID, after seating and removing the bullet that the neck OD will reduce only .001".
And, he has experimented and found that the force required to remove a bullet from a case is about constant, regardless of how tight the bullet is held in the case neck. So a squoze down neck on a bullet requires the same force to remove it as a slightly sized = .001" smaller neck on the same bullet.
Mike says that neck tension doesn't matter, that the case expands before the bullet leaves, and the bullet and accuracy aren't affected by neck tension.
His experimentation supports this, as I see it.
If there's somebody out there near Minneapolis Mn who could write about his work, Mike would be happy to show it and talk to you. We really need to document the work that this man has done. Any takers?
joe b.