Trying to identify driving band

[Torch]

Hey guys,was back out at my old firing range yesterday picking up chargers,stripper clips and projectiles from behing the target mound and I found a piece of a driving band,I'm assuming it's 20mm from the size of but wanted to know if anyone could ID what projectile/era its from,I've never seen that type of driving band knurling before,most of the debanded projectiles I've seen are just straight knurling or a wavey pattern machined into the driving band recess itself. As always any help would be fantastic!

[Torch]

Any help at all would be great guys,anyone know of a database that maybe able to help?