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mapsjanhere · January 29, 2014, 10:57 AM

Quick summary
- the 7.92 is the land diameter that was checked during proofing, as compared to the 8.2 mm bullet bullet diamter
- when the German military changed to the S bullet, all they did was ream the free flight area in front of the chamber, they didn't care whether the barrel grooves were 318 or 323. As they did that for millions of guns without problems, you can probably ignore it too.
- a lot of 8x57 rifles sporterized in the US where reamed for 8mm-06 due to the lack of 8x57 availability, if your 8x57 cartridge disappears in the chamber, check for that
- don't get me started on the IS vs JS

January 29, 2014, 10:57 AM	#3
mapsjanhere Senior Member Join Date: August 6, 2009 Location: Albuquerque Posts: 2,832	Quick summary - the 7.92 is the land diameter that was checked during proofing, as compared to the 8.2 mm bullet bullet diamter - when the German military changed to the S bullet, all they did was ream the free flight area in front of the chamber, they didn't care whether the barrel grooves were 318 or 323. As they did that for millions of guns without problems, you can probably ignore it too. - a lot of 8x57 rifles sporterized in the US where reamed for 8mm-06 due to the lack of 8x57 availability, if your 8x57 cartridge disappears in the chamber, check for that - don't get me started on the IS vs JS __________________ I used to love being able to hit hard at 1000 yards. As I get older I find hitting a mini ram at 200 yards with the 22 oddly more satisfying.