Nope. I haven't found any 175s that shoot well in my rifle. With 160 0r 140 grain bullets it is an MOA rifle.@Nevada Mike reading your OP, I assume you meant to say the 175 gr Core Lokt bullets are wildly accurate, not inaccurate.
I too stumbled upon a similar finding. I bought a box of Federal Premium Trophy Bonded Bear Claw in 175 grain and they are extremely accurate in my rifle (Ruger M77 Mk1). I then bought a case of the same ammo off of GB and have no intentions of reloading for my Ruger 7mm mag.