Dusty, the Scirocco is a picky bullet. I have tried to load this same bullet in a friend's rifle and it simply did not like it. However, I've had no problems whatsoever getting them to shoot in my personal rifles.
Curiously, if you were to inspect a Scirocco bullet on an internal concentricity comparator, from Vern Juenke, you'd find that for a factory bullet, you will likely not find a more concentric bullet. The caveat to this bullet is that it is pure lead, pure copper, i.e, pure picky.
It is an absolute repeatable tack driver, however, if in fact you find a sweet spot in a particular rifle. Moreover, I have found that it is substantially more difficult to establish a very good load in a run of the mill factory barrel/factory rifle. Perhaps it takes a handlapped bbl for optimum results. I do not know.
I have been very impressed with the performance on game with this bullet, particularly, the 180 gr. 30 cal in a 30.06 on bears, and the same bullet in my 300 RUM. It is a good thing this bullet is bonded as it is my belief that if it wasn't it would be more frangible than the Nosler Btip with its controversial reputation.