Sure I do. I've never had any issues with them. I don't run my loads super hot though:
With that being said, my preference is for the BR4 primer. They are slightly more consistent and help with accuracy:
Not a huge difference, but its there. I've been using CCI 400 primers for quite a while in the 223 and other cartridges that require a small rifle primer. I even use them in my 6WOA ar15, when I have to. Lately I've been experimenting with the CCI 41 primer and they work too, if you can find them. The 41 has a harder cup that is more intended for semi auto rifles, such as the AR15.