View Full Version : firing pin removal???
03-08-2010, 09:07 PM
Just a quick question. How do you remove the firing pin from the shroud on a rem 700 firing pin assembly? I want to change out a spring but i dont know how the pin comes apart? I assumes its threaded but i thought i better ask first. thanks Lee
03-08-2010, 09:21 PM
You need to compress the firing pin spring so the cocking piece protrudes behind the shroud. A pin has to be driven out and then the cocking piece can be removed. It may stick on the firing pin and suddenly release and the firing pin is under heavy spring tension... so this needs to be done carefully. There are tools available.
I suggest you have it done at your local gunsmith.
You may not need to change the spring out, why do you think you need to? Have you checked it's compressed weight?
03-09-2010, 05:20 AM
My spring has a slight bow to it. I can push right in the middle of the spring and watch it move. Maybe this is ok, but i have some other springs lying around so i thought i might swap one out just to see if i am having any issues there. I also like to know how things work, i always have probably always will! LOL!! But seriously i can see were my spring is rubbing against the fluted part of my firing pin. I have no idea if this is bad, but it seems to me i read that it isn't good? This spring is one of the very strongest springs i have ever felt. Maybe thats a good thing, i dont know. But basically like i said i like knowing how things work. And just maybe this is why i am having these fliers in my groups???? Also, and maybe this has nothing to do with the spring but when i go to close my bolt it is very stiff at the top of the downward push. There is a catch you have to overcome before you finish downward with the bolt. The bolt sear comes out of the notch easy enough but immediately after that there is a heck of a catch. More so than any other action i have. Again maybe nothing but i have some other kiff springs for rem 700 so i thought i would just see if there is a difference when i swap out springs??? Thanks lee
I just checked my spring pressure on my digital scale and it looks like about 27 pounds. Any ideas? The bow in the spring is slight but i can see where the spring is resting against the side of the firing pin. There again, maybe thats OK, i dont know? my action is a stiller P-1000 basically a predator action run-off. I really like the action but if memory serves me correctly the last predator action i had only had around 21 pounds of spring pressure checked the same way as i did this one. What should it be?
I have been doing a little more checking with the spring weights before work here this morning. The stiller p-1000 is averaging right around 25.12 pounds. the lawton 7500 action i have is around 21-22 pounds. Not a huge difference. I also put the lawton firing pin inside of the stiller bolt and i can feel a reduction in the bolt catch i was speaking of above. Also i dont see this little bow in the spring in any other of my firing pin assemblies. Is there any truth about having a spring rub against the pin causing erratic accuracy, or is that more inclined with the firing pin rubbing against the pin hole in the bolt face? What or were is pin drag usually happening? Please dont think i am jumping to any conclusions about any of this. the accuracy issues i am having is still quite possibly me and not being used to the new stock design. I just love this stuff and i like investigating these types of issues. I usually learn something, good or bad!! Thanks again! Lee
03-09-2010, 09:07 AM
I know nothing about the action you have. I do know that the weight of the firing pin spring at 27 pounds is sufficient for 700's. Heavy springs are harder to cock. Some tune up on the bolt notch and sear engagement may make it easier to close. I wouldn't hesitate to contact the maker for advice.
03-09-2010, 05:00 PM
I talked with Curtis at stiller's today. He said the 26-27# spring isn't any problem. He also said that it doesnt hurt anything having the spring rub against the firing pin, so who knows! I wish it wasnt rubbing but i will leave it be for now. Thanks Lee
03-09-2010, 05:23 PM
Consider that a spring will never compress in a perfectly straight line - it's either going to bulge outwards or inwards until restrained by the bore of the bolt body or firing pin (or both). One design solution for firing pins is (was) to form the body of the pin to a diameter just below that of the compressed spring, then bring it down to a suitable weight (& maybe assist the friction component) by machining it into a roughly triangular cross section.
That way, the spring unloaded in close to a straight line & maximised efficency of operation on a perfectly-weighted firing pin.
03-09-2010, 05:52 PM
Attached is a pic of a homemade jig for compressing the firing pin spring. The shroud can be screwed in and the firing pin protrudes into a hollow bolt that can be screwed in to compress the spring and expose the pin that can then be driven out. nhk
03-09-2010, 08:02 PM
Sweet! I will have to have my father make me one. Would it be to much to ask sir to have you send me some basic measurements? I have always thought very highly of the fellas at stiller as they have always been really good to me. However i do not like the idea of this spring with a bulge in it even when not cocked. It kinda reminds me of a j-lock remington spring, but not nearly as exaggerated. I can push the middle of the spring back and forth against opposite sides of the pin. Kinda like a bow!! That cant be good???? Am i wrong????? There again i am not saying this has anything to do with my fliers as it is probably all me, but it does stick in my mind, as a maybe!! Lee
03-09-2010, 08:46 PM
I sent you a PM, let me know if you didn't get it. nhk
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