Re: Accubonds or Siroccos??
I shot the 180 Siroccos in a .300 H&H, and those first boxes shot great. However, later lots never "measured up". Given the variations in weight I decided quality control wasn't what it once was at Swift. Also, we shot a lot of them into test media (old hog meat, and bones) expansion was always great, retained weight excellent, penetration not so much. Field results about the same. I recovered 2 from a big bodied mule deer, shot at about 600 yards, and again penetration could have been better. In fairness though I have given up on all 180gr bullets in .30 caliber for big game due to issues of penetration. Respects to John Nosler, but his 180gr partition didn't completely solve the problem of being able to break a moose shoulder. I've seen bull moose, and bull elk that stopped .300 magnum 180 partitions with a shoulder. Good fortune, and repeated shots allowed recovery of these animals.
I can't say enough good about the Accubonds I've used. I have played this game for a while though, and it will be interesting to see what happens to quality at Nosler as they try to catch up with production since their little mishap.