"be loading for both my bolt gun and an LR308."
Cav, if I was you (new reloader), I say stick with the fed brass until you really get the hang of it. Load it a couple of times and toss it. Don't worry about extending the life of your cases - there is risk involved. Save your LC for a while.
For maximum case life, you really need to understand all the headspace issues ( what is HS of rifle ? what is HS of sized brass? what is HS of fired brass? how do I verify incipient head separation?, etc) - and I guarantee those 2 rifles have different headspace measurements which will tend to shorten brass life if you shoot the same brass thru both rifles.