Originally Posted by
Sid Post
This cartridge was designed for easy reuse of 5.56 brass and other components.
If you want more than it can give, you lose a lot of that benefit. Personally, if I were going to wildcat beyond a simple 5.56 alternative, 6.8SPC and 6.5Grendel brass are easy places to start with lots of load data available.
I considered a 30HRT but in the end, opted for a 300H'AMR being an easier 5.56-oriented option. I also looked hard at a 7mm Raptor though, I really wanted to see the 257 Raptor become a reality but, rifle builder had some COVID deaths in the family so, that one never materialized. I still might do a 7 Raptor one day though.