What type shell casing is this?

[Fishy]

RA 18. Does that stand for Remington Arms or something else?

It's longer than a 30-06.

[CabezaBlanca]

1918 30-06.

[TXBowhunter11]

Cant help you but I'm in for the answer!

[Neck]

http://webcache.googleusercontent.com/search?q=cache:VSXiRAuqCFMJ:www.smallarmsreview.com/display.article.cfm%3Fidarticles%3D2954+&cd=7&hl=en&ct=clnk&gl=us

[sendit]

It looks like someone used an 06 case as a broken/ruptured shell extractor to me.

[Ironman]

It looks like someone used an 06 case as a broken/ruptured shell extractor to me.

That makes sense. Look down inside and see if there is another neck.

[dclifton]

2 cases in 1 ??

[AndyRealtree]

It looks like someone used an 06 case as a broken/ruptured shell extractor to me.

Genius

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[Fishy]

It looks like someone used an 06 case as a broken/ruptured shell extractor to me.

Does appear to be so. Wondered what was up with that.

[Fishy]

That makes sense. Look down inside and see if there is another neck.

Yep. Another neck inside.

[sendit]

It's an ancient Chinese secret! I have had one it 50+ years of shooting.