77/22 octagon Green Mountain barrel? - Page 2 - RimfireCentral.com Forums

Go Back   RimfireCentral.com Forums > >

Join Team RFC to remove these ads.
Reply
 
Thread Tools Display Modes
  #16  
Old 06-16-2019, 03:03 PM
donie

Join Date: 
Dec 2010
Posts: 
449
TPC Rating: 
0% (0)


Log in to see fewer ads
I went through many of the steps here on my own rifle, bedding and more.
The headspace and general looseness was perhaps more then most others I have seen. Ruger is an industry leader when it comes to casting steel, they do alot of industrial cast steel parts. I find it difficult to tell at times if a surface was machined, or if the machine marks were impressed on the part from the casting die, on Ruger guns, I would not be surprised iif the firing pin is a casting.
I have a lathe, so I shortened the chamber, and legthened the tang to take up the slop and help get the correct headspace. I also worked the face of the bolt a little in a mill. The bolt locks up without binding, and has no shake.
The final problem I had discovered was the fit of the barrel in the reciever, the hole in the receiver was not precision, and the barrel tang was a couple of thousandths larger on the end. The barrel tang and receiver were tight, but, when assembled with the wedge and screws, the barrel when moved back and forth would make a "bink" noise.
I believe bad bearing surface of the barrel and reciever was causing stringing of the shots. I read here about using green locktite instead of the screws and wedge to retain the barrel. I tried that with great success.
Anther area that took some time to get sorted was, the pressure pad for the barrel at the end of the stock, I free floated the stock with sights barrel, but found it needed the pressure point to get groups. Another small compound problem because my stock changes some going from humid close to sea level oregon to mile high and dry Butte Montana. I came up with a hardwood button for the barrel to rest on, less apt to bind from warp.



The wood button is ebony, but, I think plastic would work, I sunk a 1/2" router bit into the stock for the support button, I used shims under it to get the right pressure. The stock is a pretty straight grained piece of walnut, but, the forearm has move toward the left in 30yrs, and will move a little more in certain conditions.

Last edited by donie; 06-16-2019 at 03:12 PM.
Reply With Quote
  #17  
Old 06-16-2019, 04:12 PM
CPC
RFC Sponsor
National Guard Veteran NRA Member - Click Here To Join!

RFC Sponsor
Join Date: 
Mar 2002
Location: 
Middletown CT, Earth, 1st door on the right
Posts: 
1,205
TPC Rating: 
96% (22)
Wow... Firing pin manufactured by investment casting is something I never thought of but it does make sense upon examining it, thanks... Not something a copy cat will try since there is no great sales numbers even if cast in China....
__________________
Randy at CPC.
Reply With Quote
  #18  
Old 06-17-2019, 05:26 PM
donie

Join Date: 
Dec 2010
Posts: 
449
TPC Rating: 
0% (0)
I think Ruger is so into their casting processes, that it must seem like a train wreck to actually have to machine something.
From my own very limited observations, Ruger could give the workers something better then a bench grinder for fitting small parts
Reply With Quote
 
  #19  
Old 06-18-2019, 12:00 AM
CPC
RFC Sponsor
National Guard Veteran NRA Member - Click Here To Join!

RFC Sponsor
Join Date: 
Mar 2002
Location: 
Middletown CT, Earth, 1st door on the right
Posts: 
1,205
TPC Rating: 
96% (22)
Hehaa... Yes I noticed their crude de-burring and hand fitting ect...
Refusal to fix errors and continue bad processes... I see a bad mfg process that cost them money that has continued for 55 years and will continue forever....
__________________
Randy at CPC.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Green Mountain barrel cleanprone Savage/Stevens 4 03-13-2019 01:46 AM
September Sale at Green Mountain Rifle Barrel Company MHagar Sponsor Announcements 0 09-04-2018 08:58 AM
JULY SALE AT GREEN MOUNTAIN RIFLE BARREL MHagar Sponsor Announcements 0 07-11-2018 07:37 AM
GREEN MOUNTAIN BARREL CHOICE ??? EGA2541 10/22 Barrels - Factory & Aftermarket 17 10-06-2017 04:52 PM
August Sale at Green Mountain Rifle Barrel MHagar Sponsor Announcements 0 08-01-2017 08:27 AM



All times are GMT -5. The time now is 07:36 AM.

Privacy Policy

DMCA Notice

Powered by vBulletin
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Search Engine Optimisation provided by DragonByte SEO (Lite) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright 2000-2018 RimfireCentral.com
x