Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Long Range Scopes and Other Optics

Long Range Scopes and Other Optics Nightforce Optics


Reply

misaligned reciever holes for scope

 
LinkBack Thread Tools Display Modes
  #22  
Old 05-30-2013, 10:30 AM
Platinum Member
 
Join Date: Feb 2010
Location: Gillette, WY
Posts: 2,637
Re: misaligned reciever holes for scope

Quote:
Originally Posted by SidecarFlip View Post
I wouldn't drill them either though CNC is not required other than extrapolarion of the original bore location. I'd use a centercutting end mill myself. That way, the bottom of the hole remains flat.

I'm in the middle myself of a similar scenario with a firearms manufacturer.

I do believe that is what he used (I'm not real knowledgeable when it comes to machining). The cutter (actually the table) worked in a circular motion as it plunged... pretty dern cool to watch.


t
__________________
"I, however, view ethics as an individual decision. My ethics are mine - and I won't explain or justify them to anyone else. I seek nobody's approval, just that of my own conscience. "

Reply With Quote
  #23  
Old 05-30-2013, 12:13 PM
Platinum Member
 
Join Date: Dec 2011
Location: S.E. Michigan
Posts: 3,462
Re: misaligned reciever holes for scope

In the end, I'll wind up with a complete new receiver, but then it's a pistol, a match pistol and I bought it new. Mine is exponentially worse, to the point where with any optic moounted, there is a very visible offset in windage that you can physically see.

I could TIG the holes shut and redrill and tap but it's a manufacturing defect and while the pistol is very accurate, I don't like the offset.
__________________
'It's not about me, it's about we'..........
Reply With Quote
  #24  
Old 06-04-2013, 12:56 AM
Bronze Member
 
Join Date: Jan 2009
Location: SE Washington
Posts: 36
Re: misaligned reciever holes for scope

Place a 3' straight edge tight against the receiver parallel with the barrel. Measure gap between straight edge and the end of the barrel. Do the same to the other side. Is there a difference in the measurement. Could be the threads in the receiver were cut crooked. I happen to have a Model Seven that has a 3/8" difference. Need a lathe to true it up. Randy
Reply With Quote
  #25  
Old 06-10-2013, 07:28 PM
Junior Member
 
Join Date: Jun 2012
Location: Denham Springs Louisiana
Posts: 18
Re: misaligned reciever holes for scope

S&K rings and bases. Worked great, looks good, and run it out to 600yd 12" plate can ring it all day long. Gonna run it like this till it gives me trouble. Thanks for the suggestions.







Reply With Quote
  #26  
Old 06-11-2013, 09:05 AM
Platinum Member
 
Join Date: Feb 2010
Location: Gillette, WY
Posts: 2,637
Re: misaligned reciever holes for scope

Thanks for taking the time to update. I'm glad it all worked out.


BTW- I just stumbled across this Snipers Hide post by the Gunsmith I use discussing how he corrects the misaligned holes.


http://forum.snipershide.com/snipers...ml#post2545719

[QUOTE Originally Posted by Cproflow
OK...I'm about ready to jump in, but have a (probably stupid) question--what is the 8-40 scope base hole work, and why would I want it? I see that is a very common option being sought in this group buy. What is it exactly?[/QUOTE]


the #8-40 scope base scew upgrade serves two principle purposes.

1. As stated, they offer more surface engagement with the receiver and as a result offer a bit more strength.
2. Remington cranks out M700 actions like nobodies business. I've been told that when running full steam they can make 2500 actions a week. Impressive to say the least. The scope base holes are drilled and tapped. Drills like to wander and wear as do taps. What can happen is the holes are not on the bore centerline location. They may traverse a bit left or right.

I've seen some that are pretty bad.

As the video illustrates, we helically bore and then thread mill the base holes. What this does is in practical terms make the hole locations exact in location. This is because we are essentially single point machining the hole/thread in the same fashion as a lathe. (in spirit, but the two processes differ greatly)

So long as the machine is in good shape you have a very good probability of the holes being "jonny on the spot".

Our Kitamura is a marquee piece of equipment. Should you decide to have it done, it will do a good job for you.

Just last week I made some improvements to our work holding. It's made the setup process drop by around 3 minutes per receiver. With over 200 actions in the pipe right now, that's 10 hours of work saved.

Very cool in my book.

Hope this helps.

C.
  • Owner, Gunmaker
    LongRifles, Inc.
    3570 Mayer Suite "B"
    Sturgis, SD 57785


t
__________________
"I, however, view ethics as an individual decision. My ethics are mine - and I won't explain or justify them to anyone else. I seek nobody's approval, just that of my own conscience. "

Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes



All times are GMT -5. The time now is 05:46 AM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC