I think there may be a problem with you using the necked down 308 cases without turning them. Have you tried reloading the factory cases you fired off?
It could possibly be the bullet weight. I have two 7-08s. My Browning shoots the 139 gr Hornady Interlock spire points very well but does not like any 154 gr bullet. My Savage is just the opposite. It shoots the 154s like a champ but will not group 139s worth a darn. Both have 1:9.5" twist rates
Last edited by bronko22000; 09-22-2014 at 04:30 PM.