22" on the .458 Alaskan and both of the .458 2"'s worked very well. It's short enough to be handy and gives up literally nothing in speed. I think Phil's old guiding Zastava .458 also had a 22" IIRC. The 2"made 2,060fps with 510's and the .458 Alaskan did 2,200fps with the 500gr.