Phathead

Skip the HPH-12 it is to thick for a Omega or a Z5...

The Hph-24 might work but since the gun is new the bore might be very tight in that case you might have to use a HPH-3p-EZ the thinnest of the MMP 50 cal sabots.... The Harvester "crush rib" is slightly thinner if you need to go to it.....

Check pg 2 of this thread for the two replys i wrote might help expain it a bit more...