What kind of round is this....

[Rwhat]

Sorry, no picture yet. I have a co worker who came across alot of ammo and gave me a casing larger than a .308 with F N 48 stamped across the back. Its about 2.5" long without a bullet. Any suggestions.

[pyromensch]

7.92mm, or 8mm?

[Colt]

is that one of those "heat seeking bullets?" Been reading about them...

[novabrian]

Did the cartridge look like this?

[elrcastor]

Sorry, no picture yet. I have a co worker who came across alot of ammo and gave me a casing larger than a .308 with F N 48 stamped across the back. Its about 2.5" long without a bullet. Any suggestions.

when you say larger do you mean longer or fatter?

if it's same diameter and about 63mm long it's probably a 30-06.

[Bhobbs]

If it is 2.5 inches long it is probably a .30-06 case.

[PEZHEAD265]

Pics would help.If it has a large rim and a tapered case it could be a 7.62x54.It could be any number of shells made for the military or civilian use.

[ar15barrels]

I have this handgun.
Sorry, I don't have any pictures, but it's black and says COLT on it.
What is it?

ETA more details:
It's about 7" long and it has a round hole at the front end and wood grips at the back end.
It has a notched rear sight and a blade front sight.

[Uriah02]

I have this handgun.
Sorry, I don't have any pictures, but it's black and says COLT on it.
What is it?

[xrMike]

A quick googling of the headstamp indicates it's probably 7.7 x 56R (the European/Japanese metric designation). Also known as .303 British.

If the primer has green sealant on it, that makes it pretty certain.