Good scope ring for my HTI 50 BMG

[bunker buster]

I have the Athlon Optics Ares ETR UHD 4.5-30x56mm APRS1 Rifle Scope in 34mm so upon recommendation of the Athlon CS I should get the Athlon Optics Precision 34mm MSR Ring, Black (701007). As it turns out when I mount the scope ring onto my HTI 50 BMG rails the scope ring will not tighten onto the rails so its moving front and back and it is tighten to the max with wrench. Its as if my HTI picatinny is too small or the Athlon scope ring "claw" is too big.

What scope ring do you guys use (without breaking the bank) ?