Ok.. Let's go with a guess that cartridge game.

[W_Ellison2011]

Let's go one more round. For reference, the case on the left is a 30-06.

I'll go with 300 norma mag or 300 rum? One of the 2 I would think.

[W_Ellison2011]

I want to say the 300 rum case is a lot bigger than that but I definitely believe the norma could be that size.. but I have 0 experience with the 300 norma lol.

[Magnum_Willys]

That gently rounded shoulder rules out some like the lapua.

[Tbar]

375 Ruger?

[yorketransport]

8x68s

Well done! I really thought this one would have everyone stumped.

[W_Ellison2011]

8x68s

Well done! I really thought this one would have everyone stumped.

Holy crap that's a weird round! What are the ballistics like on it?

[bullfisher]

Awesome 
That is a very obscure cartridge york. I'll admit I had to resort to google for this one. No belt and that soft shoulder gave it away.

[yorketransport]

Holy crap that's a weird round! What are the ballistics like on it?

It's nearly identical to a 338 Win Mag/325 WSM ballistically. It's said to be inspired by the old Newton cases and to have been the inspiration for the 375 Ruger case. I'm familiar with it because of the 7mm and 30 Boo Boo designed by Dave Tooley. I'm looking to use this case as the possible parent case for my 300 and 270 Boondoggle wildcats.

Awesome 
That is a very obscure cartridge york. I'll admit I had to resort to google for this one. No belt and that soft shoulder gave it away.

Your Google-Fu is strong! I'll offer up a tee shirt or window decal for your prize if you're interested.

[bullfisher]

Holy crap that's a weird round! What are the ballistics like on it?

It's nearly identical to a 338 Win Mag/325 WSM ballistically. It's said to be inspired by the old Newton cases and to have been the inspiration for the 375 Ruger case. I'm familiar with it because of the 7mm and 30 Boo Boo designed by Dave Tooley. I'm looking to use this case as the possible parent case for my 300 and 270 Boondoggle wildcats.

Awesome 
That is a very obscure cartridge york. I'll admit I had to resort to google for this one. No belt and that soft shoulder gave it away.

Your Google-Fu is strong! I'll offer up a tee shirt or window decal for your prize if you're interested.

Saweet. I accept!!

[jmscon]

My googler says there is a 6.5mm version as well, developed at the same time by the same person.

[Evil_EdwardO]

 

[N7XW]

Good Lord, no freakin' clue.

[elkaholic123]

Is it a .577/.450  Martini-Henry

[Evil_EdwardO]

Is it a .577/.450  Martini-Henry

Winner winner 

[elkaholic123]

Is it a .577/.450  Martini-Henry

Winner winner 

What do I win? Chicken dinner...