They have all worked well for me over the years (about 45 years, to be exact). Recently, I have switched to Barnes TXS (Triple Shock) and TTSX (Tipped Triple Shock). These are solid copper bullets. So far, I have killed two nice bucks with them at 40 and 200 yards. Shot both of them squarely through the heart. One was a broadside behind the front leg - bullet went right through as advertised; the other was a straight-on shot which did not exit, but I didn't recover it. The bullets were 150 grains; the caliber was 300 WSM.