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i bought a old remington rolling block no 4 and it is starting to have case failures i am going to take it a gunsmith and see what he says
Great thinking! Has this been with one brand/lot of ammo or different brands?
 

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Looks like the chamber might have been relieved of its 'dry firing burr' a little too far..
 

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Discussion Starter · #5 · (Edited)
when I first got it did fine and now its doing it. I did take it apart and clean it it was so dirty that it was accurate and I wanted to clean it good so I took it apart andclean it really good I am just thinking that cause it and after that it started doing it thanks
 

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Check the chamber for a deep notch where the firing pin hits. Possibly the 'peening' had been repaired improperly.
Also check the firing pin for a broken tip.
If it was firing ok at first, the improper repair could have fallen out or the firing pin could have broken leaving a spear point instead of the normal round or flat tip.
Investigate everything you possibly can before going to a gunsmith...this will give you the ability to talk knowledge with him to resolve the problem.
'Peening' of the chamber by dry-fire is a very common problem with old rimfires, if a previous owner attempted to use a filler to repair the peen the filler could easily fall out after a few shots; also the firing pin could have been slightly lengthened in an attempt to over-come the peen.
The pictures you display seem to look like a firing pin issue.
 
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