winchester model 77 malfunctions - The Firearms Forum

jhymes1 · 12-16-2011, 09:51 AM

I own a model 77 and have had a couple of malfuctions. I absolutely love the rifle and cannot stand to have it sit in my cabinet broke. The firing pin no longer engages the ammo with enough force. Why is this happening and where can i order parts.

StoneChimney · 12-16-2011, 12:39 PM

There's a bunch going on in the Winchester 77. There is a firing pin, a firing pin striker (both of which have springs) and a mainspring. The problem could be with any of these. The problem could also be that the cartridge is not going fully into the chamber and the firing pin energy is being spent pushing the cartridge forward instead of denting the rim. May just be a cleaning issue and making sure the chamber doesn't have burrs.

That is something we would duplicate on our test range, then pull the rifle down on the bench for repair. No point in buying parts until you know what you need to buy.

jhymes1 · 12-16-2011, 02:06 PM

Thanks for the info. I had the 77 repaired once because of a broken mainspring. I know that it is a fairly complex mechanism because i tore it down by myself and had trouble putting it back together. I am assuming that there are some issues with wear on these parts, because their have been tens of thousands of rounds fired from this rifle. Would you suggest a complete rebuild of the firing mechanism or should i just identify the problem and fix it?

StoneChimney · 12-16-2011, 06:33 PM

We would identify the problem and fix it, and check the rest of the mechanism for potential problems.

12-16-2011, 09:51 AM	#1
jhymes1 Member Join Date: Dec 2011 Posts: 2	winchester model 77 malfunctions I own a model 77 and have had a couple of malfuctions. I absolutely love the rifle and cannot stand to have it sit in my cabinet broke. The firing pin no longer engages the ammo with enough force. Why is this happening and where can i order parts. -->

12-16-2011, 12:39 PM	#2
StoneChimney Advanced Senior Member Join Date: Nov 2010 Posts: 1,087	Re: winchester model 77 malfunctions There's a bunch going on in the Winchester 77. There is a firing pin, a firing pin striker (both of which have springs) and a mainspring. The problem could be with any of these. The problem could also be that the cartridge is not going fully into the chamber and the firing pin energy is being spent pushing the cartridge forward instead of denting the rim. May just be a cleaning issue and making sure the chamber doesn't have burrs. That is something we would duplicate on our test range, then pull the rifle down on the bench for repair. No point in buying parts until you know what you need to buy. __________________ Full service gunsmithing and firearm manufacturing shop. Licensed FFL 07/02 Manufacturer. Visit our website!

12-16-2011, 02:06 PM	#3
jhymes1 Member Join Date: Dec 2011 Posts: 2	Re: winchester model 77 malfunctions Thanks for the info. I had the 77 repaired once because of a broken mainspring. I know that it is a fairly complex mechanism because i tore it down by myself and had trouble putting it back together. I am assuming that there are some issues with wear on these parts, because their have been tens of thousands of rounds fired from this rifle. Would you suggest a complete rebuild of the firing mechanism or should i just identify the problem and fix it?

12-16-2011, 06:33 PM	#4
StoneChimney Advanced Senior Member Join Date: Nov 2010 Posts: 1,087	Re: winchester model 77 malfunctions We would identify the problem and fix it, and check the rest of the mechanism for potential problems. __________________ Full service gunsmithing and firearm manufacturing shop. Licensed FFL 07/02 Manufacturer. Visit our website!