Not sure what you mean by extreme accuracy, but probably not. However, I do want to have the confidence and ability to shoot moa or thereabout out to 400-500 yards, w a bolt action. I'm not married to a semi-autos, it's just that 308 is what I want to learn how to reload w first, and this is the rig in 308 I currently have. I'll be using it for woods hunting and practice, and figured it'll make a good testbed for my reloading process.One last thing - if you want to go the extreme accuracy route (I kind of suspect you don't, since you're talking about firing a semi-auto) then a small base die is unlikely to give you the precision you could expect from brass sized with a full length die.
Appreciate it. I'd seen some stuff online suggesting crimping isn't necessary for 308. I'm gona find out.I have used standard full length dies for years. No need for small.base in Saami chamber.
I use a Lee factory crimp die as a separate action. I don't like seating and crimping in the same stroke.
Also, I shot semi.a loooong time without crimping. If your dies resize the neck right you should have enough tension to avoid setback. I did same in a hk91 that is pretty violent action.