Fred, Damn right it works. I have had an SSK barrel (Shillen) since about 1995 and use max loads of H322 and the 80 gr. Speer SP and the Hornady 80 gr SSSP for antelope and WT. I have also used the 85 gr Nosler PT and it is better on larger WT w/shoulder shots. My 6BR Rem. is a standard 14" Contender SSK with the barrel marked "Factory or reduced loads only". It is probably the most accurate contender barrel I have ever shot (I have 6 bbls. from 17 Rem to 35 Rem now) and is plenty of gun out to 150 yds. if you shoot them right.-Muddy