I've used their cheaper (single struck) bullets for years for plinking and IPSC without any issues. A lot of people are alarmed at the diameters, but 1) the plated bullets are so soft it really doesn't matter much, and 2) it's probably a ploy to scare you into buying their more expensive "double struck" bullets. This, when we all know that the "double struck" are just the ones they sort out after a sizing inspection and sell for more money.
My advise, buy the cheaper ones unless you're chasing the state championship in your area. You're not going to be able to load these really hot anyway. They'll do just fine.