CFE 223 Difficulty?

[Snarf]

Ok so I have 123 Nosler CC’s, 123 ELDM’s, and maybe one more… my immediate thought is to load 5 each over 30.6 CFE 223, adjusting the COL to hold the same cartridge base to bullet base dimension (i.e. the same powder volume) and shoot groups over a chronograph at 100. Maybe also try 5 SST’s with a Fed 205M. I think this would cover all my bases and also finish this box of SST’s. If they all shoot poorly, it’s me/the stock, if the other two shoot better than the SST it’s the bullet, and so forth.