Quantcast
22 rim fire light primer strikes - THR
THR  

Go Back   THR > Ammunition, Gear, and Firearm Help > Gunsmithing and Repairs

Welcome to THR
You are currently viewing our site as a guest which gives you limited access to view most discussions, articles and access our other FREE features. By joining our free community you will have, access to post topics, communicate privately with other members (PM), respond to polls, and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!


If you have any problems with the registration process or your account login, please visit the help section.

Reply
 
Thread Tools
Old September 14, 2013, 12:44 PM   #1
dagger dog
Member
 
 
Join Date: January 30, 2008
Location: SO. IN
Posts: 2,574
22 rim fire light primer strikes

Could use some help and suggestions, its a early 50's H&R Sportsman, 9 shot top break, with the firing pin on the hammer.

A little history, I lightly chamfered the chambers thinking there may be a problem with the case not fully seating in the cylinder and extractor star.

I see no lateral cylinder run out and the light strikes are random with different brands of ammo and not confined to a certain chamber and very minimal end shake. The gun is in great shape for the age

Was thinking about a stronger hammer mainspring, it has an all steel strut and head, not the plastic head as found in later models. I've read somewhere about shimming under the spring to give it more power.

Once I removed the spring and strut assembly, with the spring compressed there is very minimal space for a shim, before the coils touch, maybe about
0.025".

I guess I'll try the shim 'cause it's an easy job.

Again any help greatly appreciated !

Last edited by dagger dog; September 14, 2013 at 07:49 PM.
dagger dog is offline  
Old September 14, 2013, 07:10 PM   #2
Sun Tzu warrior
Member
 
 
Join Date: June 24, 2012
Posts: 250
How much play is there, where the top strap latch of the revolver locks to the frame?
Sun Tzu warrior is offline  
Old September 14, 2013, 07:43 PM   #3
YZ
member
 
 
Join Date: November 10, 2012
Location: Midwest
Posts: 1,066
I think you are on the right track. The problem is typical for an older revolver with a tired spring (even if not shot all that much) About shimming it, no idea, I'd just replace it if possible.
YZ is offline  
Old September 14, 2013, 07:47 PM   #4
dagger dog
Member
 
 
Join Date: January 30, 2008
Location: SO. IN
Posts: 2,574
Quote:
Originally Posted by Sun Tzu warrior View Post
How much play is there, where the top strap latch of the revolver locks to the frame?
It's darn near a bank vault lock up ! The gun is in great shape just a little holster wear but it's all superficial.

I've had it completely apart, and it ain't like any Smith or Colt, kinda resembles an old Iver, in some ways. Guess I will try to find a source for a main spring.
dagger dog is offline  
Old September 14, 2013, 08:39 PM   #5
Jim K
Member
 
 
Join Date: December 31, 2002
Posts: 15,205
One thing that can cause misfires in those guns is a worn or misshapen mainspring strut head. If that is not quite right, the hammer can try to rebound before it gets in a full strike.

Jim
Jim K is offline  
Old September 19, 2013, 09:30 AM   #6
dagger dog
Member
 
 
Join Date: January 30, 2008
Location: SO. IN
Posts: 2,574
Thanks for the tip Jim, I don't have another to compare with the old strut ,but the head looks pristine to me, I haven't looked at the area of the hammer where the head of the strut bears. The bearing surface of the strut head is nice and smooth.

I used a small file to "test" the hardening and it's pretty hard as the file just scoots off with out cutting.

The 999 or Sporstman has a one piece strut head , some models used a headless strut, and others used a steel one with a plastic head.
dagger dog is offline  
Old August 8, 2014, 08:35 PM   #7
dagger dog
Member
 
 
Join Date: January 30, 2008
Location: SO. IN
Posts: 2,574
Update, bought a Wolff spring pack, and have cut a longer and slightly larger in diameter hammer main spring, but due to launching the mainspring strut seat into the next dimension, I'm waiting the arrival of a couple replacements. They should be here Mon.

Will report the results to anyone interested, once it's back together.

Hoping to use the Sportsman and my Model 12A Remington for the squirrel season opener the 15th.
dagger dog is offline  
Old August 8, 2014, 09:47 PM   #8
midland man
Member
 
 
Join Date: June 8, 2014
Location: coalgate oklahoma
Posts: 228
I love squirrel hunting and I hope summer gets outta here soon as fall is my time to chase them little guys
midland man is offline  
Reply


Thread Tools

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

Forum Jump


All times are GMT -4. The time now is 03:55 PM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
vBulletin Optimisation by vB Optimise.
This site, its contents, Shooting Reviews, and its contents are Copyright (c) 2010-2013 Firearms Forum, Inc.
IMPORTANT DISCLAIMER
Although The High Road has attempted to provide accurate information on the forum, The High Road assumes no responsibility for the accuracy of the information. All information is provided "as is" with all faults without warranty of any kind, either express or implied. Neither The High Road nor any of its directors, members, managers, employees, agents, vendors, or suppliers will be liable for any direct, indirect, general, bodily injury, compensatory, special, punitive, consequential, or incidental damages including, without limitation, lost profits or revenues, costs of replacement goods, loss or damage to data arising out of the use or inability to use this forum or any services associated with this forum, or damages from the use of or reliance on the information present on this forum, even if you have been advised of the possibility of such damages.