Some WW2 large calibers

[RCS]

The second cartridge is a Mark II C K

The third cartridge is pre WW1

[vintage hunter]

The 3rd one looks to be a .276 Enfield.

[Patrick Chadwick]

The 12.7x108mm cartridge is Chinese ? I think

Yes. It's Factory 41 (China) year 1964.

[RCS]

Thank you Patrick, I know this 12.7mm came back from Viet Nam in the 60's

The third British cartridge is the 276 cal Enfield for the Pattern 13 rifle headstamp is R^L

also interesting (I should have taken a photo) is the 7,62x51mm headstamp is CAC 60 over L2A2 N

[CINDERS]

No.2's rim is not square like the 303 looks bevelled my guess is European round in @8mm pretty vague answer but heck whats wrong with being vague as I am well past 50ish

If you want a really big round get a look inside the Bovington tank museum they have one of Gustavs or Doras projectiles there cannot say if it is the 3 tonne or the 7 tonne but at 80 cm now that is a big projie.

Cripes only knows how many grains of powder to get those mothers going the 23 and 19 miles respectfully

[emmagee1917]

Dora :
80 cm shell weighed 7 tons.
actual range was 51,000 yds....29 miles.
powder charge was 1 ton ( +/- 1/10 grain ) for 2,700 FPS.
Chris

[CINDERS]

One of Gustavs great achievements was at the siege of Sevastapol the shell penetrated a purported @90 feet of solid rock and destroyed a Russian ammunition dump, I also got the location of the 7 tonne shell wrong it is not at Bovington Tank Museum it is at the Imperial War Museum sorry guys for that.

I also used the metric measurement as that is the European standard and if your talking weights the discrepancy between the one you used tons emmagee1917 it can be rather alarming from my limited experience in 28 years of operating cranes example as follows,
Brittish ton or Imperial sometimes called the long ton = 2,240lbs
European 1 tonne = 2,240lbs
American short ton = 2,000lbs (so if you multiply this by 7 tonnes you are 1,680lbs short on your Imperial weight estimate very sad) and like the old LIMA crane I was on its load chart was in Short tons so if you were lifting 10 tonnes you had to be sure you could safely lift 22,400lbs not 20,000lbs (short ton) so there is a very short lesson on tons V's tonnes ende