The chances of a weapon exploding in your face is very, very, very slim if and when you use the weapon you should be 100% sure of all the safety precautions....Weapons such as rifles or handguns may seem to have a chance of exploding in your face but I have never read, experienced or heard of one doing so.
I do have a small arsenal of weapons and fire them often. My choice ammo is American made. Stay away from Russian and military use ammo. Large amount of carbon build up and there is always a chance of reloads to have an incorrect amount of grains pressed into a round....
The rifle, to me, is extremely safe when I use it properly. I also only use a trusted brand of weapon and my first choice is American made then German made or Italian made.
Hint: always use shooting glasses....Trigger locks when not in use and store them EMPTY....
To answer the last question I believe the brothels will be filled and overflowing before any inkling of a weapon exploding when used with care.
The rifles I have are 2-AR-16, 2-22's, 2-30-06's, 1-40cal,
The handguns I have are: 2- 357 mags, 2- 38 Specials, 3-380's, 3-1911 45's, 4-9 mm. and 2-44cal with 1-being an auto load....
Never a problem... Good luck and be safe with the weapons.