An oddball 22 centerfire case

[meatyrem]

I was out on a pd shoot and I came across this case. It's quite a bit bigger than the 22-250 case with a sharper shoulder I'm gonna guess somewhere around ( 35-40deg ). The case is stamped LC 67 across the top and NM on the bottom.
The diameter is .224"

overall case length: 2.01"
base to shoulder: 1.67"
base to neck: 1.75"
shoulder dia: .465"
base of hull dia: .472"
rim dia: .469"

This case has very little taper and is .11" longer than the 22-250. I'm just curious to find out what this case may be. It seems to definately be a wildcat to me, and I would like to know if anyone has some info they can share on this mystery case.

Thanks

[strombeckj]

Originally Posted by meatyrem

I was out on a pd shoot and I came across this case. It's quite a bit bigger than the 22-250 case with a sharper shoulder I'm gonna guess somewhere around ( 35-40deg ). The case is stamped LC 67 across the top and NM on the bottom.
The diameter is .224"

overall case length: 2.01"
base to shoulder: 1.67"
base to neck: 1.75"
shoulder dia: .465"
base of hull dia: .472"
rim dia: .469"

This case has very little taper and is .11" longer than the 22-250. I'm just curious to find out what this case may be. It seems to definately be a wildcat to me, and I would like to know if anyone has some info they can share on this mystery case.

Thanks

Sounds like a 22-243 of some sort formed from old LC Military brass (.308)

Best guess...

Jon

[Trickymissfit]

Originally Posted by meatyrem

I was out on a pd shoot and I came across this case. It's quite a bit bigger than the 22-250 case with a sharper shoulder I'm gonna guess somewhere around ( 35-40deg ). The case is stamped LC 67 across the top and NM on the bottom.
The diameter is .224"

overall case length: 2.01"
base to shoulder: 1.67"
base to neck: 1.75"
shoulder dia: .465"
base of hull dia: .472"
rim dia: .469"

This case has very little taper and is .11" longer than the 22-250. I'm just curious to find out what this case may be. It seems to definately be a wildcat to me, and I would like to know if anyone has some info they can share on this mystery case.

Thanks

might be a .224 Vias. George pushed the shoulder back and ran a 35 degree angle. He actually built two or three different versions, and remember that one was a little shorter than the other.
gary

[meatyrem]

Ya I don't know about the 22-243. I would think it would be much longer than the 22-250. This case is only about .110" longer than a 22-250. I've not yet heard of the .224 vias. Is there anywhere I could find more info on this round? Idk

[strombeckj]

Originally Posted by meatyrem

Ya I don't know about the 22-243. I would think it would be much longer than the 22-250. This case is only about .110" longer than a 22-250. I've not yet heard of the .224 vias. Is there anywhere I could find more info on this round? Idk

The head stamp on the brass is LC 67 NM which is "Lake City 67 National Match" = .308 parent. the .243 also starts with a .308 parent. The standard SAMMI specs for the .308 are below, very close to your case which we know was a .308 at one time.

.308 case info
Case type Rimless, Bottleneck
Bullet diameter 0.308 in (7.8 mm)
Neck diameter 0.3433 in (8.72 mm)
Shoulder diameter 0.4539 in (11.53 mm)
Base diameter 0.4709 in (11.96 mm)
Rim diameter 0.4728 in (12.01 mm)
Rim thickness 0.0539 in (1.37 mm)
Case length 2.015 (51.18 mm)
Overall length 2.800 (71.12 mm)
Case capacity 56 gr H2O (3.64 cm³)

It could be a .224 Vias, but based on how rare that round is I would lean more towards a 22-243 middlestead since it has a 30 degree shoulder or a .22 cheetah which is based of the middlestead with a 40 degree shoulder or maybe just a 22-243 since that round also has a 40 degree shoulder So with out seeing the case I would say this is a very well educated guess based on the info you have supplied.

Jon

[meatyrem]

Ill have to agree with you both. I'm seeing a very close similarity in the dimentions. I believe you fellas narrowed it down. It looks as though the shoulder resembles an Ackley shoulder. I wish I knew how to upload photos so I can post a photo comparing the two. I'll see if I can work on that.

[J E Custom]

Sounds like the 22 Cheetah MK II 28o

J E CUSTOM