My 20" JP did not like the IMI Razorcore. I want to say it was close to 1 moa from my JP. If you shoot some more, some group size info would be nice.
FWIW, my JP likes
Copper Creek 77gr Berget OTM
Defender 69gr SMK
Hornady Black 75gr Match
The Copper Creek and Defender shoot .25 to .5 moa...