I've had great luck with the 147 ELDs out my MPA built rifle.
The barrel is 24" and throated for the 140 ELD, but 147s are shooting sub 1/2" in the 8 twist.
If it helps, here is what I've logged so far:
Lapua SRP Brass (going on it's 3rd firing)
41.7 gr H4350
2.852 COAL (reliable mag limit)...