I am going to buck a trend here. I run 308 Lapua brass necked down in my custom 7-08. It has a 0.315" neck in the chamber and needed a light neck turn to get safe clearance. I doubt it would be an issue with a factory chamber - but make sure that you can slide a bullet into the first fired case to check.

No issues from the slightly shorter length.

Last edited by JasonF; 06/06/15. Reason: Typos - tired from hunting today