Re: What Primer for 308?
210M is a match Primer ..(meaning that more experienced people put them together) but your load is really a recipe-- powder, brass, primer, bullet all them put together.
With that said I use 210M, Varget, Lapua, SMK 175
in the past I tested BR, CCI, etc and I found for my load the Federal 210M gave me the best consistency. However it may be different for you.
FYI #34's are closer to a magnum primer then a large rifle primer I believe.
if you are looking for consistency I would build what ever load you feel is right for the rifle that give you accuracy and precision and stick with that.-- I don't understand working up a load and then "tweaking it once in a while" with a different primer.
Best of luck to you.
-K