Have you sat on those bullets for a while ?... I have the Berger reloading manual first edition, and it looks like it was printed in 2012. I picked it up at Cabelas a while ago after I had bought some of their VLD's.
There are 2 pages of loads for the 243 Win. Both pages recommend COAL of 2.710" which I believe is the SAMI standard, not anything that has bullets seated longer. I did all of my loads to that length and they shot beautifully. If one gets the throat lengthened, then it would allow seating the bullets longer, to the point that it would still fit in the magazine. My Savage magazine still has plenty of room so I can go 0.04-0.08" longer and it will still feed and function.
This list is just for information. It should match anything you got from Berger. The powders are listed by maximum charge weight. All assume the same COAL of 2.710"