ASSRA Forum › General › Gunsmithing Single Shot Rifles › H&R 1873 45-70
(Moderator Group: Moderator)
‹ Previous Topic | Next Topic ›
Page Index Toggle Pages: 1 Send TopicPrint
Normal Topic H&R 1873 45-70 (Read 4450 times)
Shorty 45-70
Ex Member


H&R 1873 45-70
Oct 29th, 2013 at 7:05pm
Print Post  
What's the cure for an H&R  Trapdoor 1873 that springs open once in a while?
Thanks, Shorty
  
Back to top
 
IP Logged
 
RobertS
Participating Member
*
Offline



Posts: 43
Location: Jackson TN
Joined: Apr 27th, 2006
Re: H&R 1873 45-70
Reply #1 - Oct 30th, 2013 at 1:59pm
Print Post  
Could your loads be a little too hot maybe?
  
Back to top
 
IP Logged
 
Shorty 45-70
Ex Member


Re: H&R 1873 45-70
Reply #2 - Oct 31st, 2013 at 7:13pm
Print Post  
Thanks for the repies to my question, my H&R has never popped open even with full  Trapdoor loads. I have been reloading  since the mid 90's. I have loaded  many Marlin 45-70's and a couple of Browning B78's.  The Browning had a steel crescent buttplate, with fullhouse loads it was a bruiser to shoot. The Marlin was a bit easier and the Trapdoor was the most enjoyable to plink the big 500's out of.
The data I used for the Trapdoor was from the Lyman manual and the starting loads were always used.  I have sold the rifle and wanted to make sure that if there was a problem that there was a fix.
My next on the 45-70 list is an 1886 lever gun, maybe I shouldn't say lever gun on a single shot forum. Lips Sealed
Thanks again for all the great info, Shorty Smiley
  
Back to top
 
IP Logged
 
John Taylor
Frequent Elocutionist
*****
Offline



Posts: 1851
Location: Lewiston, ID
Joined: Oct 23rd, 2006
Re: H&R 1873 45-70
Reply #3 - Nov 1st, 2013 at 7:49am
Print Post  
it could be a weak or broken spring in the bolt lock.
  
John Taylor   Machinist/gunsmith
Back to top
WWW  
IP Logged
 
Shorty 45-70
Ex Member


Re: H&R 1873 45-70
Reply #4 - Nov 1st, 2013 at 10:48am
Print Post  
John Taylor wrote on Nov 1st, 2013 at 7:49am:
it could be a weak or broken spring in the bolt lock.


Thanks John, my H&R has never sprung open, I needed to know the fix if it ever happens.  Shorty... Cool
  
Back to top
 
IP Logged
 
13Echo
Ex Member


Re: H&R 1873 45-70
Reply #5 - Nov 2nd, 2013 at 5:02pm
Print Post  
Unlike an original the thumb piece is attached to the locking cam by a set screw that occasionally comes loose.  When the parts are loose the cam may not fully engage and the block can open on firing.  This is a known problem with the H&R.

Jerry Liles
  
Back to top
 
IP Logged
 
Shorty 45-70
Ex Member


Re: H&R 1873 45-70
Reply #6 - Nov 2nd, 2013 at 8:20pm
Print Post  
Quote:
Unlike an original the thumb piece is attached to the locking cam by a set screw that occasionally comes loose.  When the parts are loose the cam may not fully engage and the block can open on firing.  This is a known problem with the H&R.

Jerry Liles



Thanks Jerry, I have heard of the problem, but what is the fix if it ever happens?????
  
Back to top
 
IP Logged
 
13Echo
Ex Member


Re: H&R 1873 45-70
Reply #7 - Nov 2nd, 2013 at 9:43pm
Print Post  
I've never had to do one but I would take the thumb piece cam assembly apart to inspect the setscrew and the place where the set screw is supposed to seat and make certain the parts are serviceable.  If it is OK then reassemble with LockTite on the screw threads to keep it from backing out.  I've also heard that some have drilled through the axle of the cam and replaced the screw with a pin or even soldered the whole assembly together.  I've even heard that it may be replaceable with an original assembly though I suspect this wouldn't be as straight forward as it sounds.  At the least inspect and Locktite the assembly.

Jerry Liles




  
Back to top
 
IP Logged
 
Page Index Toggle Pages: 1
Send TopicPrint
‹ Previous Topic | Next Topic ›
 
  « Board Index ‹ Board Top  

ASSRA Forum » Powered by YaBB 2.6.12!
YaBB Forum Software © 2000-2026. All Rights Reserved.

Valid RSS Valid XHTML Valid CSS Powered by Perl Source Forge

Page completed in 0.4368 seconds.