40mm Blue and Green,,,,XM?

[Lou]

I stumbled upon this nice looking "bullet" the other day and nearly sprained my mouse finger hitting the buy-it-now button. As I mentioned to another member,I googled for hours with no luck. Im interested in any info anyone could provide as to what program it might have come from,gun type,history etc etc????.

The case measures out at a bit over 40mm at the mouth,42.20mmID to be exact with a length of 175mm. A guess is that it should be called 40x175 rimmed and tapered. The taper is 48.45mm just above the rim and 43.93mmOD at the case mouth.

Projectile length is 211mm and is an even 42.10mm at the base of the projectile up to where the ogive starts,above the driving band.The driving band is 8.22mm X 43.60mm. Driving band reminds me of 40mm grenade types and also some of the WECOM projectiles and is made of copper.The projectile and case are not magnetic,most likely aluminum, doesnt feel to be too much weight to this although the bullet is solid.


Please let me know if there any other questions I can answer to help you guys with an ID?



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[rcaf53]

I have the same case but stamped 6-64 LOT-1-1 ,but no proj. If anyone out there has a extra would love to buy ore trade.
Thanks for showing the photos
frank

 

[hicky1300]

Nice Find!
I think the XM in the Headstamp is for Experimental?
I think you are right about the material being aluminium - looks as though the finish is anodizing.
I also notice how small the drive band is. Is the proj paralell or does it have a bouralete?
What web site did you get it from - may have to look there myself!!!

 

[SG500]

Nice Bullet Lou.
The only 40 x 175 I know of is the 40mm VRFWS round (Vehicle Rapid Fire Weapons System) and that, according to the cartridge list I have, has a rimmed case with a smaller rim.
Good find!
Dave.

 

[ordman]

Lou
I almost jumped on this one I have two of the casings but never found any info on them
They make great pencil holders

 

[charley777]

Greetings to all...
I have listed, but have never seen, this round :- 42.1x176R (rim 53.7mm) US project XM-6005.
So is the rim of your case 53.7mm ? If so we seem to have a match (-:
Thanks for showing the photos. Any further information welcome.
I am wondering also about the 40x175R VRFWS mentioned by Dave....but of course that is 40mm and this is 42mm....
Charley

 

[Lou]

Thanks for the replies,,
Charley,yes sir,the rim is 53.7mm,its a match.

OrdMan,thanks for letting have it!!!!! LOL. I cant believe you passed it up,but then again if you have two already.... Are both your cases marked the same as this one?

Thanks Dave,,,

Hicky,its parrallel for sure. Where did I find it??? Belive it or not,EBay,,,,,

Frank, show your case??

 

[Lou]

Just wondered,anyone know of the program mentioned above?