yeah, could mean trouble...Believe it or not, a reverse condition exists with the beloved .308.
By reverse, I mean an increased failure risk in some rifles to use civilian .308 in a NATO spec 7.62X51mm chamber. Some of the hundred plus year old pre 1898 mausers converted to 7.62X51mm come to mind.
OT
Met an Army Sniper in between tours who sold me a Glock working at the local gun shop this weekend. He said they use .308 bolt and M-16 exclusively unless they need to shoot through a car or cinder block then they use 50mm. I asked why they don’t use a .300 win mag and he said the Army is converting over to them soon. FWIW
yeah, could mean trouble...I would not worry much about the Mauser 98’s. Now the Spanish Mauser 95’s are another issue. Some were converted to a homegrown round dimensionally identical to the 7.62x51. With only two locking lugs and the inferior Spanish steel, there is a very serious problem.