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3IN MARK II M2 case - 1943

It is the right case, but be aware that it was also used in the 3 inch mobile AAA gun and the 3 inch Antitank gun. It came out of WWI as a AAA case.
 
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It is the right case, but be aware that it was also used in the 3 inch mobile AAA gun and the 3 inch Antitank gun. It came out of WWI as a AAA case.
Phew! I'm aware the case wasn't exclusive to the M7 gun, I just wanted to make sure it was correct for my tank / anti-tank ammunition collection.
 
Yes, correct. Now you need an M79 AP-T projo or M62 APCBC-T projo.
I believe you forgot the M42 HE projo....good luck, I have found all Army 3" projos very, very hard to find....and cases (whether steel or brass) only hard to find. You are half way there. I posted the process I used to remove the rust from one of my projos, and I buy all 3" Army cases and projos I can find knowing the scarcity. I put the 3" in the " advanced" category, but being in England you may have better luck finding them.
 

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I've seen other cases for sale in the UK, but never loose projectiles. Milcorem does resin replicas, but they aren't cheap.

Possibly a stupid question, but why do some US 3-inch projectiles have a single cannelure and others a double? My case has crimp marks for the latter.
 
I've seen other cases for sale in the UK, but never loose projectiles. Milcorem does resin replicas, but they aren't cheap.

Possibly a stupid question, but why do some US 3-inch projectiles have a single cannelure and others a double? My case has crimp marks for the latter.
Never noticed, I will check my cases. As for " not cheap", I paid what I thought dearly for the first one of my M62 projos ($225 USD plus shipping) and the other M62 and the yellow M42 in an auction lot gladly half of that. Many ( like me at the time) did not understand the differences between a 76mm, Navy 3" and Army 3". Quite confusing until I had my questions answered here. That is why I view Army 3" projectiles as " advanced".
 
I didn't forget the M42. He said Antitank, so I listed the AP projectiles.
 
I've seen other cases for sale in the UK, but never loose projectiles. Milcorem does resin replicas, but they aren't cheap.

Possibly a stupid question, but why do some US 3-inch projectiles have a single cannelure and others a double? My case has crimp marks for the latter.
What I have, a 1942 dated brass casing, single line crimps. The steel 1944 dated , same and has yellow ink markings. My 1943 dated steel one I believe is unfired, it is pristine and has no trace of any crimps. It has red ink markings on the case. I seem to recall a double lined crimp on an odd 3" casing I sold off awhile ago, it was pre war dated, 1920's or 30's date. Some one really wanted it, it went for about $200.
 
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