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

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.

It has been explained in this thread that a SG with a firing pin with a return spring would be safe in the described operation whereas an inertial firing would not.

What has not been explained in this thread is what firing pin system is used in the Alpharms SA15.

My last post which you seem to be objecting to is an attempt to determine whether or not this specific SG has a return firing pin spring.
 
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It has been explained in this thread that a SG with a firing pin with a return spring would be safe in the described operation whereas an inertial firing would not.

What has not been explained in this thread is what firing pin system is used in the Alpharms SA15.

My last post which you seem to be objecting to is an attempt to determine whether or not this specific SG has a return firing pin spring.

Do we have to spell it out for you?

Take the gun apart. Disassemble it into upper and lower receivers.

Grab the upper receiver.

Push the bolt into the closed position.

Press on the rear of the firing pin.

Does the firing pin return to it's starting position, or does it remain depressed?

If it returns: You have a spring in there. Yay!

If it does not return: You do not have a spring. Boo!
 
Believe I watched a video of Zombie Hunter where he did that with a Hatsan (realizing the OP has a different SG)...
 
Magpul dynamics teach it (along with most other courses) it's a combat reload load or Qyick shell change over plain and simple. Now having said that your barrel should "always" be in a safe direction when loading shells. If one goes off by accident for any reason it should always be a non issue because your barrel was already in the correct direction.

I will say after rereading your post that I would not use my bolt realease button to load it, for two reasons, one could a slam fire happen 1 out of 1000 times sure it could. 2 your shell may fall out, hang up or miss feed. Both semi auto mag fed or not just use the charging handle to feed a shell gives you more controll over what's happening.
 
When you normally cycle the bolt, and chamber a shell, does the firing pin leave an indentation on the primer? If it does, I wouldn't make a habit of dropping the bolt on an already chambered round; some of the inertia that drives the firing pin forward must be used up chambering the round. I've been meaning to run a test on my gas guns to see how many times the same round can be loaded before it slam fires, but I haven't got around to it yet.
 
In 50 years of gunsmithing I have never encountered or heard of a problem with letting the bolt slam on a live round except when the firing pin was broken.
 
There is a spring on the firing pin.

I tried it at the range with the muzzle safely pointed down range. I dropped the bolt on Federal 2.75" OO buck and Challenger 7.5 birdshot and no slamfires.
 
And think about it, would a firearm manufacturer really produce something that was only safe if operated with specific technique?
Far more likely to build something that is idjut proof
 
in order to load my hasten, you toss one in the chamber, hit the release, then flip it upside down and load the tube. only other way would be to hit the release, load the tube, rack the lever, then load another one in the tube.
 
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