Rail question

J

j mckinnie

Guest
What is the usual length of the rails/how far do they generally travel.How much does the rear move for windage adjustment?
Thanks Jim
 
The third rail gun I built is built on 16" centers from the front pedestal point to the rear windage points. The rails are 8" long. Windage will adjust about a 1/2 to 3/4" from one side of the range to the other. My second rail gun had a windage cam set up. It had 1/10" of total movement with a full rotation of the cam. It was a little critical setting up, but was plenty of windage to go from one side of the target to the other. The main advantage of having more movement is that it's not as critical to set up on target and you also can adjust over to your neighbor's targets and see how they are shooting. Travel under recoil is only a couple of inches or less. On 16" centers, it takes app. .0044" windage movement to move 1" at 100 yards or about .001" movement will move you 1/4" on target.

Mike2004rail-1.jpg


There have been a few changes since this photo was taken. The scope base is about two inches higher and there's a cartridge block mounted next to the loading port. It also now has a trigger guard that funnels empties into the bullet box below the drop port. The action is a Stiller Diamondback drop port.
 
Mike Bryant said:
The main advantage of having more movement is that it's not as critical to set up on target and you also can adjust over to your neighbor's targets and see how they are shooting.
Click to expand...

Mike is correct about this, but he forgot to add that this is probably the number one cause of crossfires, when competitors forget to move their railgun windage mechanisms back to their own target frames..................................Don
 
You must log in or register to reply here.
Back
Top