My rifle has a medium palma barrel, and with a K624i and Tenebraex caps, I mounted them in the Seekins 34mm 1.0" High rings and there's still over .10" of clearance between the rim of the Tenebraex cap and the barrel. I could have mounted them in the Seekins Low .92" and I still would have been ok. Keep in mind that Seekins calls their .92" ring Low and the 1.0" ring High. With your heavy palma countour your barrel is about .1" larger in diameter and you might not have room for the Tenebraex cap with a .92" low ring. If I were you I'd go with the 1.0" high rings to be on the safe side. Having the scope .08" higher isn't going to make any difference to your cheek position.