Interlocks work! When I moved to Wyoming in my early 20's I owned just one rifle. Model 70 Pre '64 FWT in .270 Winchester. I used the 130gr. Hornady Interlock and that .270 on the first 13 elk in 13 seasons that I killed and kept elk meat in the freezer every year. No one told the elk back then that a .270 wasn't a big enough rifle and you must use super premium bonded bullets like we're told now days. Long live the Hornady Interlock.