I was just wondering if any of you guys have had a chance to see how the CMP AP ammo shoots. Many thanks,
Charlie
I've posted this on the CMP forum.......
The other day I tested some of my M2 AP (AYR 28) against an old 3/8” AR500 steel target. The target was hung at 200 and 100 yards with the back of the target against a wire fence. The target could not swing freely but it did have some give. Rifle used was a M1903 Springfield. The results surprised me. With the exception of one round, the AP did less damage than I expected although the damage to the steel plate was significant compared to non AP ammo. This plate was originally placed at a private shooting range and has withstood thousands of rounds without damage.
Target and Rifle
Multiple hits at edge of target. I believe the one pass thru is the result of the plate being slightly softer at the edges, probably a result of the cutting process. The pass thru was the first round fired at 200 yards.
Multiple hits at edge. Good shot of pass thru.
Back view of pass thru
Hit at 100 yards
Multiple hits at center
Hit at 200 yards center of target
100 and 200 yard splash together center of target (100 yd at 11:00)
You're right! I'm surprised too! I used to shoot that stuff at the new gongs on our range to break them in and they would always leave holes like the one you indicate. The rest of the holes look like ball. The plates were as thick as yours and hardened too. The AP would put holes in transport truck brake drums shot through the thickest part! Nothing else would do that kind of damage for months. Who makes that cartridge?
The ammo used was M2 AP (AYR lot 28, headstamp 56) made in Norway by NAMMO-Raufoss, recently sold by the CMP. The plate is a target made and sold by the MetalMan. 3/8" AR500 hardened steel.
The only way to find out what's inside the AP bullet is to section one. That will tell if it's tungsten core or just a steel penetrator. Both are used these days and loosly called AP.
The only way to find out what's inside the AP bullet is to section one. That will tell if it's tungsten core or just a steel penetrator. Both are used these days and loosly called AP.
How would one determine whether it is a tungsten alloy or just a hardened steel penetrator?
That would be correct. A file will cut a steel penetrator but not a tungsten penetrator. I have one here that has been used for a metal prick punch without deformation. Now how bout the Norwegian ammo?
That would be correct. A file will cut a steel penetrator but not a tungsten penetrator. I have one here that has been used for a metal prick punch without deformation. Now how bout the Norwegian ammo?
I sectioned one of the AYR M2 AP rounds. It looks exactly like the one Skip showed. A file will only scratch up the surface, it does not create a cut in the material. I filed the AR500 plate and the file was able to cut it. The AP core used as a center punch dimpled the plate. The core is magnetic and weighs 5.20 grams or 80.2 grains.
The core I have here weighs 79.5 grains and is also magnetic. The mystery deepens for me, I don't understand why that AP didn't do more damage to the plate? I know the core came out of a D.A. 51 bullet made for machine gun belts for use in tanks. It was sold off as surplus and most of it went to the US and then back to Canada. I have a quantity of bullets only and still shoot them on occasion.
Last edited by browningautorifle; 06-28-2010 at 11:57 PM.
AP ammo shoots. Many thanks,
PM
Originally Posted by Charlie59
