Looks like a mortar round.
How about measurements?
But it is not mortar.because it has not fuse on point
I think I see a driving band. Where was it found?
I think it is 120 mm for chieftain tank
The rifling visible speaks against a traditional artillery system.
And systems with a rifling like this usually are muzzle loading mortars with pre-engraved driving bands.
Here you can see the typical rifling of a (British) 120mm tank gun.
Like always: for a propper ID measurements and markings are needed.
To add to what Alex (EOD) is trying to point out, the projectile in question is possibly close to 100 years old or older and may have a pre-engraved driving band used with trench guns such as the German Minenwerfer of WW1. The lack of an obvious nose fuze only indicates it does not have an obvious nose fuze, nothing else.
Example showing the wide pre-engraved driving band below:
And as Alex said dimensions and additional photos may help to provide an ID.
PS. I see what appears to be a line (pointed out by red arrows) in the photo of the unknown projectile??? Possibly an internal fuze??? Or an unfuzed projectile with a screwed in nose???
Brian, thanks for your patient explanation and clarification of it.
I am lacking this ability sometimes…
Yaserdome, for an ID also the region where this items was discovered would matter.
Where was this one found?
And you you happen to know if it was loaded or maybe an inert TP.
Brian, did a quick websearch and found this image showing it well: