I can get 2.263" AOL using Nosler or Speer BTHP's. These bullets seem to be about the longest available (0.739") except for the heavy weight .224's meant for the faster twist barrels.
This length of 2.263" only has about 0.030" of room left in the magazine, but they still cycle well without a bit of trouble in my A-bolt Browning. I know I'm still way off of the rifling tho, I wish I could get closer, but it ain't gonna happen.