The fear of twist is great with many gun makers.
With a new round and new SAAMI specs, start with 8 twist like Nosler did with the 8 twist 26 Nosler and 9 twist 28 Nosler.
That way, it's not like rolling out an 8 twist .22-250 with its long twist history and legacy.
New round, new twist, new specs.
Long, heavy for caliber projectiles will make it essentially a new round, so similar to the .22-250, yet so different...
DF