Yes I'd agree with blackheart. Old school means the approximate era of the design of the gun.
Old just means old.

In my safe I have one gun I put together from an action made in 1900 A Lee Speed copy. Here it is before I did any finish work on it
[Linked Image from live.staticflickr.com]OLYMPUS DIGITAL CAMERA by Steve Zihn, on [bleep]

I also have 2 flintlocks one of which is of a style made in about 1755 but I made the gun in 1995. here is what that one looks like.
[Linked Image from live.staticflickr.com]My Rifle 3 by Steve Zihn, on [bleep]


The flintlock is of an older "school" even though it's 95 years younger then the action of the 303. But the action of the 303 is way older.

Last edited by szihn; 06/30/20.