Yeah, this one confused me as well. I read the reviews on Midway's web site about these bullets and out of 28 reviews, most claimed alot of expansion, Sierra says just the reverse. Not having tried these on game or knew of anyone using them on game at these speeds I droped them from my list.
I do know someone using plain jane 180 remington core-lokts with 76gr of IMR4350 and he gets pencil size hole going in and about a tennis ball comming out with boiler room shots.
I want something just a little less distructive.
