I use the 154 grain IB over the IL in my 7x57 because they are marginally more accurate 0.7 - 0.8" vs 1.1 - 1.2" not much difference. Had a box of IBs. If I run out of those IBs I will probably load the ILs and be done with load development. I have a 98 Mauser with a 24" Adams and Bennet barrel. I set the bullet 0.025" off the lands in Win cases with Fed 210 primers and 46 grains of H4350 with either bullet for little over 2700 fps. Love my 7x 57.
