I have to chuckle - Page 4

Bart B. · January 5, 2013, 07:38 AM

Some years ago, Ruger had problems with their receiver's not having barrel tenon axis well in line with their boltway. Other makes have sometimes had a receiver go out with the same problems.

Boresighting a bent barrel by looking through it then zeroing the sights on some down range point may not reveal its issue. Especially if it's only the last few inches of the bore that's bent. If the barrel is straight and both visual or muzzle-collimator boresighting ends up being way off from the scope's optical-mechanical axis, then the receiver's barrel tenon threads are crooked.

Note that putting a scope's adjustments at mid point in their range does not necessarily have them centered on the scope's optical-mechanical axis. That axis is typically off center of a scope's adjustment range. The only way to get a scope's reticule in line with its opto-mech axis, that is the center of the main tube front to back, is to put the scope in two fixed V blocks, one at each end of the tube, rotate the scope and make adjustments until the reticule center stays at the same place on the target as the scope's rotated through 360 degrees. That shows that as the scope's rotated, the image of the target where the reticule's centered doesn't move and therefore is exactly aligned with the scopes opto-mech axis. That axis is what the rings on the bases hold the scope at. And the amount of adjustment either side of that zero will typically be different both ways for both E and W knobs. Most folks are quite surprised at what they find out by doing this then checking the error between the bore axis and where the scope's axis is by boresighting.

So, check your mounted scope's alignment with the receiver with bases and rings attached only with the scope's adjustments set to the scope's true zero.

J2. · January 5, 2013, 08:37 AM

Forum: A place to get any and all possible answer, to any and all possible questions. Also a place to have an endless discussion on any and all topics.

Most of the Green-Horn dilemma could be eliminated simply by cancelling a cable subscription and reading a good book.

I'm no expert sniper or 1000 yrd shooter. I will never need to shoot more than a couple 100 yrds. I can hit what I need to on any given day. Experience with your gun is all you need and well thought questions will help you get there.

ak2323 · January 5, 2013, 05:50 PM

"I have to chuckle".

Whatever gets you through the day. Sounds like you're feeling a bit inferior and jealous of these noobs who buy high end equipment.

January 5, 2013, 08:37 AM	#77
J2. Senior Member Join Date: June 12, 2008 Location: The Real America Posts: 149	Forum: A place to get any and all possible answer, to any and all possible questions. Also a place to have an endless discussion on any and all topics. Most of the Green-Horn dilemma could be eliminated simply by cancelling a cable subscription and reading a good book. I'm no expert sniper or 1000 yrd shooter. I will never need to shoot more than a couple 100 yrds. I can hit what I need to on any given day. Experience with your gun is all you need and well thought questions will help you get there. __________________ "Those who hammer their guns into plows will plow for those who do not."

January 5, 2013, 07:38 AM	#76
Bart B. Senior Member Join Date: February 15, 2009 Posts: 8,927	Some years ago, Ruger had problems with their receiver's not having barrel tenon axis well in line with their boltway. Other makes have sometimes had a receiver go out with the same problems. Boresighting a bent barrel by looking through it then zeroing the sights on some down range point may not reveal its issue. Especially if it's only the last few inches of the bore that's bent. If the barrel is straight and both visual or muzzle-collimator boresighting ends up being way off from the scope's optical-mechanical axis, then the receiver's barrel tenon threads are crooked. Note that putting a scope's adjustments at mid point in their range does not necessarily have them centered on the scope's optical-mechanical axis. That axis is typically off center of a scope's adjustment range. The only way to get a scope's reticule in line with its opto-mech axis, that is the center of the main tube front to back, is to put the scope in two fixed V blocks, one at each end of the tube, rotate the scope and make adjustments until the reticule center stays at the same place on the target as the scope's rotated through 360 degrees. That shows that as the scope's rotated, the image of the target where the reticule's centered doesn't move and therefore is exactly aligned with the scopes opto-mech axis. That axis is what the rings on the bases hold the scope at. And the amount of adjustment either side of that zero will typically be different both ways for both E and W knobs. Most folks are quite surprised at what they find out by doing this then checking the error between the bore axis and where the scope's axis is by boresighting. So, check your mounted scope's alignment with the receiver with bases and rings attached only with the scope's adjustments set to the scope's true zero.

January 5, 2013, 05:50 PM	#78
ak2323 Senior Member Join Date: December 8, 2011 Location: Texas Posts: 190	"I have to chuckle". Whatever gets you through the day. Sounds like you're feeling a bit inferior and jealous of these noobs who buy high end equipment.