OK, I have a 6.5x55, 25-06,7x57, 30-06, 300WSM, and a 300 win mag. I am really thinking about building a .243 Ackley on a Mauser that I just aquired. Probably getting a 24in Shilen bbl and an ambi-thumbhole from MPI. Is this cartridge a good choice for shots out to 500yds? I am all ears, let me know your thoughts. Checking back later. Thanks!