I've loaded the 165 gr SST's with 47.9 gr of IMR 4064 (Sierra's accuracy load from the current manual at the time) and got excellent accuracy 1" groups. The interlok is basically the same bullet without the polymer tip. I have had some great results using Hornady bullets in the past in several sizes and weights from 22 up to 35 cal. Some of the best prices out there too.