Dont do this
See post #19
not every rifle has the firing pin fully extended position past the bolt face when in a un cocked position.
to put things into perspective , i have a couple of ag42's , that when you manually cycle rounds through the action , it will dent all the primers .
if a person closed a bolt with the firing pin down on a live round , and if the firing pin was protruding , i feel there is still less chance of a round going off than cycling the action on a a42 and having the firing pin smack the primer with inertia .
all ag42's do this each time the action is cycled , either manually , or automatically , the floating firing pin will hammer the primer when the bolt slams shut , but not so hard to set the primer off . ( btw I only use cci #34 primers n my ag42 because of this )
i actually tried to set a old beater rifle off ( 96mauser ) , loaded with just a primer .the case had been previously fired in this rifle and was not resized , so the headspace was very tight .
i made sure the firing pin was extended past the bolt face and dropped it about 8 feet , butt down a couple times ...... nothing happened ...... I was expecting something similar to how the ag42's dent the primer . instead I found a small mark at most a couple thou deep .
that said , if you have a magazine , it really isn't that hard to walk around with a empty chamber and load one when needed .....
how many times has Remington recalled rifles for faulty triggers and safety's .
how many years have some people walked around the bush with faulty triggers and safetys on their Remington rifles in ignorance .... how many still do ?
how many rifles out there have been monkeyed with so they have hair triggers , or accidently disabled safety's , or both ... and still walk around the bush hunting , sometimes in complete ignorance ?
the best thing to do is plan for the worst case scenario and practice proper muzzle control