Re: .243 Win
nashlaw, I would have thought so too. 4064 works great in my .308 loading, but shot like crap in the .243. It's even showing promise in .223, with at 69 grainer, though the best load is at published max (25 grs.) and I think another .5 will bring it in. Wondering if I should start lower and work toward the mid-range load, as opposed to starting at the mid-range and working up?
There are always alternative. Lighter bullet, changing OAL. Mine is a Win. Mod. 70 , 1:10 twist. Stealff claims good accuracy with 36 grs. with an 87 grainer, go figure?
Throw me a bone and tell me your best .243, 4064 load, BarnesX 90 gr. hp.