I wouldn't write off a bullet/company because of performance issues with one gun/barrel length. I have two Savage model 99C's in 308. Same barrel length, same year of manufacture. They are as close to identical as two guns will get. One will shoot 150 gr core locks beautifully. The other one patterns like a shotgun at 50 yards. The core lock is a great bullet, it just doesn't get along with that particular barrel.
I have a Weatheby Vangard in 22/250 that hates every bullet I've ever feed it. Except for 50gr moly coated vmax bullet from Hornady. But with that bullet it is the second smallest grouping rifle I own. And the one that does better cost one whole heck of a lot more money.
I have no experience with the Fusion bullet, but federal is a top seller so I'm assuming they have their act somewhat together. And the ammo ive used of theirs will get the job done. I'd recommend trying the Fusion bullets in another gun sometime down the road.