Another option besides the .220 Swift, .220 Wilson-Arrow if you want a fast twist and heavy high bc projectiles is the .22-243 Middlestead. Feeds better and is faster than the .22 Creedmore, so less wind drift and more energy plus flatter trajectory, has a longer neck, easy to get brass for, 30 degree shoulder. Barrel life is slightly less than a Swift or .22 Creedmore.
