So far it looks like the Federal Gold Match 130 Berger Hybrid is overpressure (flattened primers) and inaccurate in my JP barreled 6.5 Creedmore AR10.  The tube had 115 rounds through it before the Federal, but I was actually about to order some Prime to try until the Federal groups sucked so bad.  I will clean the barrel and try again just in case the barrel was dirty.

On paper it appears these are nearly the same thing.  So am I right and should I avoid Prime for my gun just like the FGM?

Dude just rock some 147gr ELD's.

Not as accurate as the 140ELD-M loading in my rifle

Odd that you're having issues with the 147's, and everything else except the 140's. My BA 6.5CM barrel shot the 147's just as well. Handloads and 142smk's and it got very impressive.