Technically you can make them work in the acp, but you will be guessing at how much to reduce charge and then you should have a longer expander to go deeper ect.....Case bulging maybe an issue. After all that they most likely won't group good, but you never know. I still have a box of the plastic tipped Hornady's that I figured I could make work, but after lining them up with a case and seeing how deep they need to go, they are sitting here, maybe for a single shot or revolver you(and I) could get by with them nicely in the acp. I am hoping someday to run across a decently priced .45lc Ruger for a deer hunting gun.
BTW those Barnes would be an excellent deer bullet in a LC