Well everything seems to function ok when cycling live rounds through it, the thing is what happens during the firing cycle, acts differently, this rifle firing .22 shorts should cycle the action, the rubber buffer is to soften the recoil of the long rifles.
Im thinking I'll have to study the hammer, sear, disconnector for something that just dont jibe. All summer That free Remington 552 jam-a-matic had been sitting there in the corner gathering dust and I know to fix its ailments its going to involve using my brain, I could just buy new parts till it works but my father always stressed trouble shooting something before foolishly throwing money away.
So I did some googling of Remington 552 jam's and other cycling issues.60% the forum threads discussed bad ammunition.In my case I had a mixture different ages of Federal bulk, CCI blazer and Remington Golden.So was it ammunition?
I have my doubts.For it to choke on almost all of them I suspect its something with the rifle, this ex-camp gun most likely had seen harsh environment but Im skeptical that its worn out, Id be surprised if it'd seen as much rounds through it as a run the mill 552 plinker that chewed thrugh several bricks would have , but what could its ailment be?
Burrs?Quite a few posts on different forums about nicked up bolt guides , boogered firing pin's with burrs even on the on the hammer, some posts about wobbly hammer causing side binding, still others on dirty and worn sear notch fit, and then there was this one Odd post that seemed to jump out at me.reguarding a misassembly that can cause all sorts of mayham.
Gun Hub forum post by nctorberson Feb 02, 2014 · reply #4Quote: 'disconnector is above thesmall lever that allows hammer to **** before the trigger resets. It must be below it'
http://gunhub.com/rimfire/58339-remington-552-speedmaster-firing-issues.htmlThat got my attention and now Im all fired up to tear that thing back open to check it again, according to Gun Hub, there was a posted photo but that is only viewable to Gun Hub members.It'd cool to see that photo, but I think I will just forge ahead with that scant advice and check it out for myself.
I might have to check Brownells .22 rimfire iron to burnish the chamber as its possible dryfiring could have boogered up the rim of the chamber as live rounds cycle through just fine but to have a round stick after the firing pin strikes the case (stuck dud) it just might be one the other issues this rife has to work through.
In the past Ive used a taper punch to clear chamber boogers.I think I might have to check out Ebay. has Remington service manuals for this model. NOTE: For some reason they canceled the order and refunded my money.Some noise about not shipping to NW Alaska.
For a Paul Harvey like 'The Rest of the Story' ending can be found on another sight with all my info.
https://www.gunandgame.com/threads/reminton-552-with-a-tummy-ache.181962/#post-2147291If you have checked the fiting pin protrusion and its good (0.045) and still
Light firing pin strikes due to excessive head space you best bet is to reduce the headspace.
In a 552 Speedmaster thats done using something abrasive like a wet stone and take down a little off the barrel extension.