A primed case will sit flat when placed on a level surface. If it rocks, the primer needs to be seated deeper.
Allowing that you clean the metal correctly and use the correct primer.
Remove and reinstall the wheel. You do not have the lug nuts installed correctly. The wheel was not seated properly.
Etch primer
Small pistol small pistol primer
reverse primer, going from stop to start codone
SOME ammo can be reloaded. Not all can be. A fired cartridge case is cleaned, and the old primer removed. The case is lubed, and pushed into a sizing die that squeezes the brass back to it's original shape and size. A new primer is seated in the primer pocket, and a measured charge of powder poured into the case. A new bullet is pushed into the case mouth, seated to the correct depth, and may be crimped in place.
Keyboard connector is not correctly seated
Centerfire cartridges differ from rimfire cartridges in that a separate primer is seated in the base or head of the cartridge. When struck by the firing pin, the primer ignites the propellant via the flash hole in the base of the cartridge
DNA polymerase III requires a primer, which is a short piece of RNA or DNA, in order to function correctly.
Allowing that you clean the metal correctly and use the correct primer.
Remove and reinstall the wheel. You do not have the lug nuts installed correctly. The wheel was not seated properly.
I'm just guessing - but you may have a broken firing pin spring. I suggest you take your firearm to a qualified gunsmith. a few ideas = are you using reloaded or custom loaded ammo - if so the primer may be seated to deep - if your gun is a revlover the cylinder may not be positioned correctly - if a round was fired in the gun that was too hot it may have expanded the chamber making the round seat to deep
The best way to tell is to take it to a coin collector and see what he/she thinks.
You can check to see that the primer is properly seated into the primer pocket, the brass is crimped properly and the overall cartridge length is correct. However, you can't accurately measure the powder charge and that's the most important, and potentially dangerous, component in reloaded ammunition.
The obvious answers would be that it is not in correctly and seated, or it is not correctly adjusted for 0.004 - 0.006" of clearance.
no answers.com does not tell every thing correctly but only few answers it can tell correctly and also it does'nt know so many answers
centerfire merly means that the bullet is fired via a primer seated in the rear middle of a cartridge. that differs from a muzzel loading firarm which requires the charge to be set off with a nipple cap as apposed to a center fire primer.........