In order of power 25 creed, 25 prc, 25 SAUM/SS/max anything more than that is just too overbore and of little gain.
But honestly anything that has Lapua or ADG brass I guess starting with the x47L on up. Obviously just necking up/down is my first case choices as are the above. Hence all have sharper shoulders . But after that 243, 3006, 270W, 3006, 6 rem, 6.5x284N.
See no reason to use any parent case with belt not to mention no lapua. All of these has anything you could want in a quarter bore. Improve the cases if you want AI etc but more for better case life and less trimming if anything. You can do a lot with a short action and certainly a medium one or a tikka t3.
But honestly anything that has Lapua or ADG brass I guess starting with the x47L on up. Obviously just necking up/down is my first case choices as are the above. Hence all have sharper shoulders . But after that 243, 3006, 270W, 3006, 6 rem, 6.5x284N.
See no reason to use any parent case with belt not to mention no lapua. All of these has anything you could want in a quarter bore. Improve the cases if you want AI etc but more for better case life and less trimming if anything. You can do a lot with a short action and certainly a medium one or a tikka t3.