I think you might grow into longer bullets once you find that you enjoy that. You can also buy factory ammo with longer bullets. There was a compairison on some website that compared the two and no noticeable difference in accuracy with shorter-lighter bullets. This is from my experience. I bought a tikka T3 lite with an 8" twist. It shoots most bullets well but I've found that I reall enjoy the 75 grainers and 64 grainers. So to some degree it also depends on how long the wait is. The 1 in 9 twist will shoot 75 grain Amax bullets but not the Sierra 77 or 80 grain bullets.