Simple answer, No.
If you mean +P ammo the answer is no. It is rated for standard pressure ammo only.
you can, but not very often.
No, i asume you dont have see .380 pistol and a revolver 38 spl, the .380 and 38 spl ammo share de same diameter boot no the longer, the 38 is for a 38 special revolver tipe and the .380 is for an automatic pistol tipe some people call 9mm short.
yes, but don't shoot the P ammo too often
the spl.
the spl.
The gun is likely a Harrington & Richardson (H&R) model 925. The caliber is .38 Smith and Wesson (S&W) special, not to be confused with .38 special (SPL). You must shoot the .38 S&W ammo, not .38 spl.
.38 special IS the correct ammo for a gun chambered in .38 special. Trying to take a round and push it into the barrel is not the way to "test" to see if it's the correct ammo because the cartridge or bullet won't fit into the barrel that way unless you force it. If the gun is a .38 special, you buy .38 special ammo and it will work.
If it is only listed as .38 Special (spl), use only that ammo. If it is .38 S&W special, use only that ammo. Don't try to mix them. The diameters are not the same. If you still cannot determine the actual cartridge caliber, take it to a gunsmith and have them identify it for you.
No.
There is no such thing as a ".38 Special +P" firearm - it's still a .38 Special, with some indication from the manufacturer that it is capable of handling the higher chamber pressures of the more heavily loaded +P cartridges. That's the only difference between a regular and a +P cartridge - more powder.