yes
you can, but not very often.
yes, but don't shoot the P ammo too often
Be aware! Never fire ammunition in a weapon not chambered for it! Stick to the .45 colt ammo.
7.62x54R
No. While there ARE firearms made to fire both the .45 Colt and the .410 shotshell, they were made for that purpose. Never attempt to fire ammo that a firearm was not made to fire.
You need to contact Colt for a correct answer.
.38 Special. It can also fire .38 Short Colt and .38 Long Colt. Do not attempt to fire .38 S&W from a .38 Special.
If it is chamberd for it, yes.
In most cases the answer would be no, but there are some revolvers with addition of halfmoon clips can safely fire the correct semi auto ammo...
NEVER FIRE AMMUNITION IN A WEAPON NOT CHAMBERED FOR IT!!!!!!!!!!!! Danger, Danger, Danger,#@@@@@@@@@@@@@@@@@@@@@
If you mean can you fire non plus P ammo in a gun rated for plus P, yes, you can safely do that as long as it is the correct caliber.
Depends. What is the caliber of the AR-15 rifle? If it marked 5.56, yes. If it marked .223, no. While you MAY fire 5.56x45 ammo in a .223, they are NOT the identical cartridge, and it is not a good (or safe) practice. .223 ammo can be safely fired in a rifle chambered in 5.56 mm. The 5.56 chamber is cut a bit longer than .223 to help insure operations in the field in the presence of dirt, etc. 5.56 NATO ammo is also loaded to a higher pressure than .223. So- to recap- 5.56 in a .223- NO. .223 in a 5.56- yes.