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  #1  
Old 05-20-2019, 09:59 PM
xroads xroads is online now
 
Join Date: Feb 2013
Location: east hartford ct 06108
Posts: 286
Default 1903a3 jam problem

purchased a used and sported 03a3 from lgs, primarily because it was already d&t for a redfield base w/rings.
detail stripped and cleaned the rifle, added a cheap scope and took it to the range for test firing. what happened upon ejection has me baffled.
when ejected normally, no problems.
when ejected with vigor, the bolt jams on the ejector and will not go forward.
it's like it goes too far back. tried changing the ejector (2x), bolt body (2x) and even changed the complete bolt assy (2x).
still happens. anyone out there got a clue as to what is causing this?
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  #2  
Old 05-20-2019, 10:15 PM
Allen Humphrey Allen Humphrey is offline
 
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Location: Dry side of Washington
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Just have to ask if the cutoff is in the OFF position.

After that check the rear left lug for damage resulting from repeated slamming of the bolt to the rear.
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  #3  
Old 05-20-2019, 10:27 PM
xroads xroads is online now
 
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cu toff is in the "on" position when this happens.
bolt lug is good on all the bolts that I tried.
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  #4  
Old 05-20-2019, 11:14 PM
Allen Humphrey Allen Humphrey is offline
 
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Location: Dry side of Washington
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Not sure of your familiarity of theses rifles so no offense intended. In the ON position the rifle is configured to feed rounds from the magazine. After the last round the follower blocks the bolt from going forward. If you are single loading rounds this would happen witheach shot unless you short stroke the bolt. The OFF position prevents the bolt from coming back as far but can only operate as a single shot.

I apologize if I’m not understanding your issue correctly
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  #5  
Old 05-21-2019, 01:01 AM
colemanw colemanw is offline
 
Join Date: Jul 2013
Location: Eastern Washington
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Quote:
Originally Posted by Allen Humphrey View Post
After the last round the follower blocks the bolt from going forward. If you are single loading rounds this would happen witheach shot unless you short stroke the bolt.
Taking bets!
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  #6  
Old 05-21-2019, 05:48 AM
xroads xroads is online now
 
Join Date: Feb 2013
Location: east hartford ct 06108
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Default 1903a3 jamming the bolt to the rear upon ejection

yes, I'm very familiar w/way that 03's operate, as I've been shooting them for close to half a century.
problem only occurs when feeding from mag w/cutoff in "on" position, and only when operated in a rapid fire manner.
I have never seen this problem before, so I was hoping someone here could offer some perspective as to what the fix might be.
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  #7  
Old 05-21-2019, 07:17 AM
Rich/WIS Rich/WIS is offline
 
Join Date: Nov 2009
Location: Corbin, KY
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Check the cut-off, if the shoulder that stops the bolt is worn on vigorous ejection the bolt may be sliding past a worn shoulder and binding. I have seen any number of cut-offs that have been badly battered. You might also try "painting " the bolt with a felt tip pen and seeing if you can find where it is binding. There isn't much for it to bind on so this problem is really puzzling.
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  #8  
Old 05-21-2019, 07:40 AM
98Charlie 98Charlie is offline
 
Join Date: Oct 2009
Location: WI
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Quote:
Originally Posted by Rich/WIS View Post
Check the cut-off, if the shoulder that stops the bolt is worn on vigorous ejection the bolt may be sliding past a worn shoulder and binding. I have seen any number of cut-offs that have been badly battered. You might also try "painting " the bolt with a felt tip pen and seeing if you can find where it is binding. There isn't much for it to bind on so this problem is really puzzling.
Well, this makes good sense as he tried changing complete bolts, different ejectors, etc. and there isn't much left to change. I'm interested to see how this turns out.
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  #9  
Old 05-21-2019, 08:03 PM
Jpm Jpm is offline
 
Join Date: Oct 2013
Location: Massachusetts
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its easy enough to just remove the cutoff entirely and test drive it that way
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  #10  
Old 05-28-2019, 07:45 PM
xroads xroads is online now
 
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Location: east hartford ct 06108
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update on my 1903a3 jamming.
changed out the cutoff with a known working one from another of my a3s.
problem solved, and by the way, the original cutoff worked fine in the rifle that I swapped it out of.
probably just a case of "stacking tolerances".
thanks to all for your input
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