Is it safe to drop the bolt on a shell in the chamber using the bolt release?

I'm not an AR guy (just realized it's not :)) but it's not something I'd do in my XCR, or any gun I can think of.
I was taught to always feed from the mag.

If your trying to load 6 or 11 rounds, load the chamber then do a mag change.
 
Is there a spring on the firing pin? The only issue would be the FP coming forward with enough force to cause an oops, so if the FP is sprung, it should'nt be an issue. Of course, test this where it's legal and safe to go bang.
 
I don't know about the SA15, but dropping a round into the receiver and hitting the bolt release is the way I load my VersaMax.
 
MOST (no all) shotguns have a firing pin return spring. If there is a spring, you are good to go. If the firing pin free floats, then I would not recommend it.
 
been fine when I have done it on various guns, including non springed firing pin guns.

Could it potentially be an issue with a very soft primer and a non springed pin? hypothetically...
 
even if it did go off prematurely it would fire once the bolt actually had no where to go. the force will push the firing pin back until it hits resistance(the chamber front) you'll be fine. no different than putting a round into any semi auto chamber and just releasing the bolt
 
Doesn't the bolt slam on the back every time the gun is cycled? Technically I guess grabbing it from the mag but same difference, ends up in the same spot. I have a Uzkon TR100, haven't tried this yet, but I guess i'm going to have to now. :p
 
Doesn't the bolt slam on the back every time the gun is cycled? Technically I guess grabbing it from the mag but same difference, ends up in the same spot. I have a Uzkon TR100, haven't tried this yet, but I guess i'm going to have to now. :p

My original question is in regard to will the bolt not having to physically strip the new shell from the magazine, be travelling too fast when it meets the already chambered shell thereby increasing the chance of a slamfire?

The secondary concern is does this practice stress the extractors.
 
Doesn't the bolt slam on the back every time the gun is cycled? Technically I guess grabbing it from the mag but same difference, ends up in the same spot. I have a Uzkon TR100, haven't tried this yet, but I guess i'm going to have to now. :p

Pushing a round from a mag adds substantial resistance to the chambering cycle, drastically slowing the velocity of the bolt. Think about it, the bolt has to overcome static force and accelerate the shell and overcome force of friction holding the shell against the magazine lips, it then has to push them past the lip and angle the shell into the chamber, where the shell is forced to straighten out and is slides across the face of the bolt into the chambering position where it is finally driven forward and the bolt locks. However, if the bolt is flying forward only the minute force of the extractor snapping over the rim and the regular friction of the sliding bolt assembly oppose it's forward movement. The firing pin could potentially gain enough momentum to slam forward against the primer and set off the shell, and it may do so when the gun is unlocked, depending on the design.

Most bolt-action fire arms will "shoot themselves closed" wherein closing the bolt partway and pulling the trigger sends the firing pin forward while simultaneously locking the bolt, and assuring the gun is mostly locked up before the firing pin can even contact the primer. Another example is the AR15 where the firing pin cannot touch the primer until the bolt is 100% locked. Of course this doesn't necessarily prevent a slamfire, but it does prevent an out-of-battery detonation.
 
Pushing a round from a mag adds substantial resistance to the chambering cycle, drastically slowing the velocity of the bolt. Think about it, the bolt has to overcome static force and accelerate the shell and overcome force of friction holding the shell against the magazine lips, it then has to push them past the lip and angle the shell into the chamber, where the shell is forced to straighten out and is slides across the face of the bolt into the chambering position where it is finally driven forward and the bolt locks. However, if the bolt is flying forward only the minute force of the extractor snapping over the rim and the regular friction of the sliding bolt assembly oppose it's forward movement. The firing pin could potentially gain enough momentum to slam forward against the primer and set off the shell, and it may do so when the gun is unlocked, depending on the design.

Most bolt-action fire arms will "shoot themselves closed" wherein closing the bolt partway and pulling the trigger sends the firing pin forward while simultaneously locking the bolt, and assuring the gun is mostly locked up before the firing pin can even contact the primer. Another example is the AR15 where the firing pin cannot touch the primer until the bolt is 100% locked. Of course this doesn't necessarily prevent a slamfire, but it does prevent an out-of-battery detonation.

That is true. I guess there would be substantial resistance in feeding from the mag compared to closing the bolt on a chambered round. I guess the biggest question would be, if the round were to slam fire, what is the potential outcome? Would there be damage to the gun? Is it safe to do or should I guy be slowing releasing the bolt if he would want "6" shots?
 
That is true. I guess there would be substantial resistance in feeding from the mag compared to closing the bolt on a chambered round. I guess the biggest question would be, if the round were to slam fire, what is the potential outcome? Would there be damage to the gun? Is it safe to do or should I guy be slowing releasing the bolt if he would want "6" shots?

It all depends on the gun design. Three basic scenarios; Best case scenario the bolt slams forward and the gun does not fire. Best-Worst case scenario, the bolt flies forwards and fully locks before the gun slamfires in a hopefully safe direction. Worst case scenario, the bolt flies forward and sets the shell off before the gun locks, resulting in a slamfire and out of battery detonation, possibly resulting in high-velocity flying gun parts and a chance of minor to fatal injuries. Unless your gun has a firing pin spring, or a mechanical feature that prevents a cartridge/shell from firing before the gun is fully into battery, I would not try it.
 
With my bolt locked back I can't feel a firing pin protruding from the bolt (like an SKS). If I shake the SG I don't hear a pin sliding back and forth in the bolt.

Does this mean that it is an inertial firing pin?
 
I wouldn't try it either way. It has been explained, your awareness of the dangers covered. You have to ask yourself, how much are my hands and face, especially your eyes worth to you?
I know how much I appreciate being able to wipe my own ass.
I'm not trying to be a jerk either, just how important is it to you to fire 1 extra shell? I would do it to save my life, but can't imagine another scenario where I'd tempt the aforementioned risks.
 
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