Any chance you could test their heavier .357 load?
Actually, I'd be interested in seeing if the 180gr bullet swerves off like the 10. Maybe compare it to a heavy swc as well as they typically go straight.
If you're interested I could send some 158swc-wn and trunacated reloads(13.5gr 2400) to see if bullet design would make a difference.
Im leary of shooting others reloads so I understand if you decline