Quoted:
I have been using Winchester standard primers for my reloads in .308.  I mostly use them in a non match M1A and a FAL.  I usually use 150 gr Hornaday bullets.  Most of the time I load with BLC (2).

Yesterday on a spur of the moment I picked up 1000 magnum large rifle primers simply because they were available.

I know that in .223 they suggest magnum primers when using BLC (2).  I have never seen magnum primers called out  in the loading data for BLC (2) in .308.

Does anybody have any experince in using magnum primers in .308?  I assume it would increase the pressure but would also would cause better combustion.

Any wisdom before I work up the loads?

Magnum Primers

Magnum primers contain a greater amount and/or slightly different explosive mix than is used in standard primers. On ignition, magnum primers give longer burning, hotter flames. Their use is recommended for (1) any ammunition that will be used at or below zero degrees F., (2) with most Ball powders and (3) with slow burning rifle powders like MRP and IMR 4831 in very large cases. Magnum pistol primers often will give more uniform velocities in magnum handgun cartridges loaded with large charges or slow powders like 296, 2400 and H-110. Magnum primers may be used with faster burning or easy-to-ignite powders, but normally there will be no advantage in doing so. As when changing other components, it is advisable to reduce powder charge weights on initial loading with magnum primers.

Quoted:
I use magnums for any ball powder.