129g Interlock does not let you down, if your rifle likes them!

When shooting SST's, I would go heavy for caliber

6.5-140g
7mm-154

7mm 154g sst is a super bullet on white tails, we use the 154g Interloc on hogs. 7 mags will shoot a hole through both shoulders on a large hog with the 154g IL, it was our elk bullet also out to 550 yds with R#25 win WLRM primers.

Two friends went to Africa with Weatherby 7 STW's with the 162g sst loaded and took the 6 major plains game each, all one shot, MV of 3150, lot tougher bullet than the 154g sst.