Finally got some big game bullets to try in my Rem 223. Loaded 55Gr Barnes Triple Shock and 60Gr Nosler Partition. 25 Gr of H335 for the 55 Grainers and 24 Gr H335 for the 60 Grainers. Shot at 100 yards and the 55 Gr shot very well as expected and the 60Gr shot almost as well. Need to try another powder and see if I can do better. No signs of keyhole for the 60Gr. Just nice round holes.