If you go that route IMR4895 is your friend in the .308. It can be loaded down some 30 to 40% below max and still maintain good accuracy. I played around with reduced loads in the .308 back in the early 90�s, both gas checked cast and round nose jacketed .30-30 bullets and maintained excellent accuracy (1� or so) down to 2200 fps.
Use starting loads for IMR4895 out of your manual and if they are still too fast you can work down to your desired velocity.
No Hodgdon or IMR4895, but have Varget. And a start load of 41gr for a 180gr slug lists 2470fps from a 24" barrel. Think I'll go with this to begin with, and should put me right at 2400fps with the lighter 170's and my 21" barrel.
