I'm looking for powder recommendations for 223 that do NOT result in a compressed load.  I normally load a standard 55gr boat tail ball bullets.  I use a lot of Winchester 748 and have had good results with it.  But at 29 grs the case is filled to the brim and every time I index my 550 a little power spills out.  After a 100 rds or so the press is a mess and I have to clean it.  Any recommendations on powders that hold consistent and are not a compressed load?