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Model 63 broken or not?
April 18, 2021
6:31 pm
WACA Guest
Forum Posts: 7
Member Since:
April 18, 2021
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Will the model 63 fire even when the bolt is not fully closed. Being a blow back design there is no locking into battery as in most semi auto Winchester designs.

The 351 SLR will not fire if the breach block is not well forward in the closed position. Is the 63 different and I have a broken action?

April 19, 2021
2:39 am
SO. Oregon
WACA Member
Forum Posts: 647
Member Since:
June 5, 2015
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 It is a blowback action and uses the weight on the bolt and any additional weights riding with it to delay opening before pressure is safe. There’s no locking mechanism.  Being a Rimfire it can’t fire the cartridge if it is not fully supported by the chamber face…thus closed. Have someone familiar with the 63 look at it.

Southern Oregon
NRA member
Fraternal Order of Eagles

 “There is but one answer to be made to the dynamite bomb and that can best be made by the Winchester rifle.”

Teddy Roosevelt 


April 21, 2021
3:16 pm
WACA Guest
Forum Posts: 7
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April 18, 2021
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I can open the action enough to see the breach block is out of battery, pull the trigger and the hammer will fall. I have two model 63’s and both will do it. The Winchester 07 in 351 caliber will not fire when out of battery. Looking at parts break down, I see little to suggest that there is a means of preventing a round being fired if the breach block is out of battery.

Cleaning this gun very well is critical. A feeding problem can cause a round to not chamber correctly. Between being able to fire out of battery and the shear inertia of the heavy blow back action, can discharge a rim fire 22 round not properly fed into the chamber.

David Whitmer (in Virginia)

April 21, 2021
3:23 pm
Peru, NY
WACA Member
Forum Posts: 59
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January 17, 2018
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Yes i can do that with mine too. In fact i always do it after cleaning and if the hammer is in cocked position. That way the hammer spring is at rest. I make sure the bolt is pushed back just enough so the firing pin doesn’t make contact with the chamber face.

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