Winchester model 100 expert needed - Page 3

Dixie Gunsmithing · March 9, 2015, 03:25 PM

It's firing okay, but not holding the scope position?

98 220 swift · March 9, 2015, 03:35 PM

no it goes full auto now. Good thing I only put 2 shells in it.

Dixie Gunsmithing · March 9, 2015, 07:29 PM

It has a bad rear disconnector hook on the trigger, or hammer notch is worn for it then. It could also be the disconnector hooks spring bad.

Check the notch on top of the hammer, to see if it is rounded off, and not square. That notch is what the rear hook catches. Also, check to see if the hook is rounded over, or if the spring isn't pushing the hook forward hard enough. The rear hook should be engaged firmly with the hammer notch, with the trigger held back, and jarring it shouldn't make it let loose.

The last to check, is make sure the hammer has no sloppy movement about its pin. It should rotate, but not move side to side, or rock, etc.

Kapusta · March 15, 2015, 10:46 AM

May not be relevant at this point, but back when I was in the business, if I recall correctly, there were 2 or 3 different sizes of extractors for the M100. Something like a-b or c or the like. The size was related to how long the extractor was. Seems as there was enough variation with the bolt machining to make this necessary.

pricedo · April 15, 2015, 01:45 PM

Have a post 64 model 100 in 308 Win with the impressed checkering.
I've owned several Winchester model 100s.
If you find one that consistently prints 1 1/2" or less 3-shot groups at 100 yards consider yourself very lucky and hold onto it.

Rules of engagement:
1) gun needs to be stripped and cleaned after each & every hunting season. If you get the gun wet you need to strip it down & clean it.
2) each & every time before going into the field check and make sure the screw that is part of the forearm sling swivel ring assembly that secures the barrel to the stock is snug.
3) my Winchester model 100s showed a propensity for shaking loose scope base screws. If you're scoping your model 100 thoroughly clean the top of the receiver and bottom of the scope base as well as all the screw holes with degreaser and then securely Locktite the base screws in. Any residual oil finding its way onto the scope base screw threads will prevent the metal to metal Locktite grip that you need to hold the base secure.
4) don't drown the model 100s action in oil. Use only a drop or two of high quality gun oil that won't turn to sludge in cold weather and work it in by cycling the action. Too much oil attracts dirt and the 100 even more than other SA rifles is very dirt/grit/rust sensitive.

pricedo · April 15, 2015, 02:19 PM

Another handy tidbit of information that might prove useful.
If you split the stock of your Winchester model 100 autoloader new ones can be had at Boyds Gunstocks.
http://www.boydsgunstocks.com/
The price at the time of this posting is $74 USD.

March 9, 2015, 03:25 PM	#51
Dixie Gunsmithing Moderator Emeritus Join Date: April 27, 2013 Location: Ohio Posts: 1,923	It's firing okay, but not holding the scope position?

March 9, 2015, 03:35 PM	#52
98 220 swift Senior Member Join Date: January 4, 2015 Location: Perryville MO Posts: 426	no it goes full auto now. Good thing I only put 2 shells in it.

March 9, 2015, 07:29 PM	#53
Dixie Gunsmithing Moderator Emeritus Join Date: April 27, 2013 Location: Ohio Posts: 1,923	It has a bad rear disconnector hook on the trigger, or hammer notch is worn for it then. It could also be the disconnector hooks spring bad. Check the notch on top of the hammer, to see if it is rounded off, and not square. That notch is what the rear hook catches. Also, check to see if the hook is rounded over, or if the spring isn't pushing the hook forward hard enough. The rear hook should be engaged firmly with the hammer notch, with the trigger held back, and jarring it shouldn't make it let loose. The last to check, is make sure the hammer has no sloppy movement about its pin. It should rotate, but not move side to side, or rock, etc.

March 15, 2015, 10:46 AM	#54
Kapusta Member Join Date: February 22, 2015 Posts: 24	May not be relevant at this point, but back when I was in the business, if I recall correctly, there were 2 or 3 different sizes of extractors for the M100. Something like a-b or c or the like. The size was related to how long the extractor was. Seems as there was enough variation with the bolt machining to make this necessary.

April 15, 2015, 01:45 PM	#55
pricedo Member Join Date: September 3, 2008 Location: NRA LIFE MEMBER Posts: 55	Have a post 64 model 100 in 308 Win with the impressed checkering. I've owned several Winchester model 100s. If you find one that consistently prints 1 1/2" or less 3-shot groups at 100 yards consider yourself very lucky and hold onto it. Rules of engagement: 1) gun needs to be stripped and cleaned after each & every hunting season. If you get the gun wet you need to strip it down & clean it. 2) each & every time before going into the field check and make sure the screw that is part of the forearm sling swivel ring assembly that secures the barrel to the stock is snug. 3) my Winchester model 100s showed a propensity for shaking loose scope base screws. If you're scoping your model 100 thoroughly clean the top of the receiver and bottom of the scope base as well as all the screw holes with degreaser and then securely Locktite the base screws in. Any residual oil finding its way onto the scope base screw threads will prevent the metal to metal Locktite grip that you need to hold the base secure. 4) don't drown the model 100s action in oil. Use only a drop or two of high quality gun oil that won't turn to sludge in cold weather and work it in by cycling the action. Too much oil attracts dirt and the 100 even more than other SA rifles is very dirt/grit/rust sensitive.

April 15, 2015, 02:19 PM	#56
pricedo Member Join Date: September 3, 2008 Location: NRA LIFE MEMBER Posts: 55	Another handy tidbit of information that might prove useful. If you split the stock of your Winchester model 100 autoloader new ones can be had at Boyds Gunstocks. http://www.boydsgunstocks.com/ The price at the time of this posting is $74 USD.