It was a subjective assessment on a Barnes penetratration path. Noted on a "Texas" style rear spine shot.FMJ seems to penetrate more linearly on other animals.Would a solid penetrate in a more linear fashion? May be deception due to the non expansion of the FMG and the natural curvature of the spine.Yes, FMJ's are not Solids.I have no real experience with true solids on game but I assume it somewhat similar.I guess thats why Barnes still has solids and X Bullets.Theoretically the solids should penetrate deeper and more linearly than the X's..

I enjoy Barnes alot and expecially the TRX.If the barrel likes solid copper bullets they're great.Gotta be careful loading them on the hot side with the longer heavier bullets though-

For long range shooting heart lung is acceptable but if you want to really ground them I feel the Shoulder is the best shot.