The most powerful in terms of muzzle energy is probably the .950 JDJ. The rifle weighs 80-120 lbs and even with ports and an 18 lb muzzle break with 4 Mercury recoil reducers the gun still has 200+ ft lbs of recoil.
.950 JDJ 3,600 grain 2,200 fps 38,000 ft lbs of energy.
The most powerful shoulder fired cartridge is the 700 Nitro Express with a 20 lb rifle and still 160-200+ ft lbs of recoil.
700 Nitro Express 1,000 grain 2,000-2,600 fps 8,900-15,500 ft lbs of muzzle energy.
The most powerful sporting rifle/cartridge also goes to the 700 Nitro Express.
If you count black powder elephant rifles as sporting cartridges then its the 2 bore with its 1.32 in. muzzle diameter and its low muzzle velocity keeps it virtually painless and yet kicks slightly more than the 700 Nitro express.
S&H 2 bore 3,600 grain 1,500 fps 17,000 ft lbs
There is no most powerful airsoft sniper rifle that you can just buy. But, Iv'e heard of guys tuning them over 800fps with custom parts. My most powerful is 600fps.
First, it is rifle, not riffle. Second, no, or we would shoot tanks with a rifle. Cannon are more powerful. Finally, depends on the rifle. I have a .22 rifle and a .44 magnum pistol. The pistol is far more powerful than the rifle. I also have a .22 pistol, and a 30-06 rifle. The rifle is far more powerful than the pistol (in THAT example).
The most powerful cartridge developed specifically for civilian use would be the .585 Nyati.
.950 J D Jones
Anzio Iron Works 20mm
thr .405 Winchester is the most powerfull lever action rifle used by teddy Roosevelt in Africa on safari.
The cannon. If you mean powerfully based on accuracy then the rifle.
If you are asking "WHAT" not "Where" is the most powerful under lever .177 air rifle. Then I suggest the "Hatsan Torpedo 150 air rifle." I comes in at around 1250 FPS where as most of the other under levers fire at around 950 to 1000 FPS. However Under levers are not the most powerful air rifles. The PCP (PreCharged Pneumatic) Class of air rifles are the most powerful air rifles. An "Air Force Condor and the Evanix Rainstorm" fires a .177 cal pellet at 1300 FPS.
Rifle, shotgun, or handgun? The 10 gauge shotgun at close range would be very high on the list, as would some of the buffalo rifle cartridges, such as the 45-110. The .45 Colt revolver was possibly the most powerful handgun of the day.
Each range is different depending on their insurance.
The Gauss rifle is a very good weapon. It kills most with one hit. It is more powerful the higher your energy weapons skill is.
Air rilfes have been made that will take down large game.