100-300 USD
Shorter barrels = less MV
Check the receiver and barrel
A couple of owners lifetimes.
Too broad a question. Muzzle velocity is determined by the specific cartridge, barrel length, barrel tolerances, etc.
A barrel is the part that holds the shot shell or casing that the bullet or BBs go down towards the target. In a Center fire rifle or pistol the barrel has rifling to help stabilize the bullet after it has left the muzzle
Not enough info to answer. What model, blue or stainless, what barrel?
Yes, you can fire a .357 Sig round (not a .357 Magnum) in it, but you must first change out the .40 barrel for the .357 barrel.
100-1000 USD or so depending on EXACTLY what you have.
The front runner until fairly recently was the Casull .454 that produces 1900 ft lbs of muzzle pressure. However, with the release of the S&W 500 magnum x-frame .50 cal. revolver, the leader has shifted. The S&W 500 magnum produces a whopping 2600 ft lbs. muzzle pressure. No other more powerful pistol, revolver or double action (semiauto) can match it for size or power.
The breech simply refers to the end of the barrel which you insert the cartridge into, which is the opposite end of the muzzle. The chamber is the actual area which the cartridge is inserted into.
Pistol, Tarurus
A type of muzzle loading firearm- catch is, you don't load it from the muzzle. The barrel is threaded onto the frame, and there is a wrench to unscrew it. With the barrel off the weapon, fill the chamber with powder, set a lead ball on top, then scew the barrel back on. While slow to reload, this design gave a very tight bullet-to-barrel fit, was very accurate and hard shooting. Link below is to a photo of a well made screw barrel pistol- you can see line where barrel unscrews.