Originally Posted by BullShooter
Here are some maximum dimensions for the two cartridges according to CIP, with mm measurements converted to inches:
Code
                  7x57    8x57        
                --------------    
Rim Thickness:   .0453	  .0512
Rim Diameter:    .4764    .4705
Head diameter:   .4728    .4701

Shoulder dia:    .4299    .4311
Shoulder length: 1.7260  1.8190
Shoulder angle:  20.90°  19.10°


The 8x57 values were based on the 8x57 IS cartridge data. SAAMI values for the same cartridges differ a bit from CIP values. Most cartridges will have actual measurements less than those listed here.

Using the approximate volume values in Ken Howell's cartridge book, the 8x57 case will have about 6% greater capacity.

Name? Call it the 7mm Bandukwalla, or 280 or .284 Bandukwalla. With a British accent, it might be the 275 Bandukwalla.

--Bob

I like the way you think; I'll call it the 275 Bandukwalla