Technically yes.

But, how come the guns don't blow up all the time ?

Maybe because someone actually thought about it all those years ago and worked out it would pass proof and be safe ?

What do you think Custom gunmakers around the world do ?
The same type of things - take metal away fore and aft.

I am quite happy firing my 318's, more so than some guns made by backyard gunsmiths, er, sorry, backyard butchers in the US
where they don't have to pass proof.