CCI loads all the 17HMR ammo except for Winchester. So be it CCI, Hornady, Remington, Federal and old Winchester, it was loaded by CCI. Basically it is all just a different lot. Now Winchester has developed a new way to make the rimfire brass for the 17WSM and it is done the same way on their 17HMR ammo. The case is actually a little stronger than the CCI stuff, or so I am told. Give CCI a call, they are nice to talk to and they will tell you whos ammo they load.