Used the Sierra years ago on speed goats,thought they opened up too quickly.Made the switch to the Speer 145 SPBT got better accuracy and penetration.The Core-Least have never been on my radar!! .....although my father-in-law swore by them in his thudy-thudy!!
You better be afraid of a ghost!!
"Woody you were baptized in prop wash"..crossfireoops
.....although my father-in-law swore by them in his thudy-thudy!! 
