"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.
... still waiting for that stimulus to kick in ...