✅ SOLVED Help with Military Ordnance

[HuntinDog]

Hope you can shed some light on what these may be.

The bullet in the middle is a 50 caliber.

The one on the left is steel and measures
36.70mm +/- at the base
38.00mm +/- at the rifling lands which are copper or brass
36.70mm +/- above the rifling
28.75mm +/- at the top
and 113.00 total length

Now the one on right I have no real idea if it is part of a round or not.
I'm thinking that it maybe the fin section of a mortar shell. or it could be farm equipment parts.

I see I made a rookie move and mixed up the items in my last picture, but I'm sure you can figure it out.

Thank you for any help on the two unidentified.

 

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[Dug]

Mortar shell fin is my vote.

 

[Jason in Enid]

Fins looks like the back part of a mortar round. Other one looks like a solid tank or howitzer training round with a tracer hole in the base. I don't know why it's it so flat at the front though.

 

[TheCannonballGuy]

The projectile on the left is a World War 2 era M59 APC (Armor-Piercing-Capped) 37mm Solid-Shot (non-explosive). For verification, and to see the cap's internal structure, go to the following link and scroll about halfway down the webpage:
An Introduction To Collecting Artillery Shells And Shell Casings - International Ammunition Association

The many slightly-diagonal grooves on your specimen's brass sabot (also called the driving-band) mean it has been fired from a rifled cannon.

Jason, as the photo shows, this projectile's nose was shaped like a watertank tower's low-angle roof when it was made... and straight-on impact with a thick solid metal object (or perhaps a granite boulder) flattened the projectile's nose even further.

 

[HuntinDog]

Thank you guys...
After a quick measurement of the fins on the Mortar it is 80mm across the fins, so I'm thinking M252 81mm Mortar.

The M252 81 mm medium weight mortar is a British designed smooth bore, muzzle-loading, high-angle-of-fire weapon used for long-range indirect fire support to light infantry, air assault, and airborne units across the entire front of a battalion zone of influence. In the U.S. Army and U.S. Marine Corps, it is normally deployed in the mortar platoon of an infantry battalion.

similar to this...

HH