My Savage has a 1:14 twist. (my .222 also has 1:14, and my .223 1:12)
I'm happiest shooting 35 and 40gr with the Hornet,
40, 50, 52gr with the .222 ,
and 55gr with the .223 .
I once owned a Hornet that put long 52gr Hollow Points sideways through the target at 25mtrs,
and a .220Swift with unknown twist that did the same with 59grs.
cheers,
Sean in 'Godzone'