I bought a box of Hornady's .223 45 gr "Hornet" bullets. They are way too pointed to function in my rifle - the case mouth is past the cylindrical part of the bullet at the maximum OAL. I looked at a picture of the Sierra version and it looks more rounded. Anyone have experience with these? Looks like I can load the Hornadys in my .223 with the same powder as the 55 gr bullets.