I'm ordering a new barrel for my 308 FTR rifle. I can't decide between the .090" & the .170" freebore options. I would eventually like to go 1000yd, so that would dictate the .170" for use with 185gr & 200gr bullets. But being a tad recoil shy, I'm concerned about that. If I go with the .170" freebore, how would it shoot a lighter 168gr bullet? Will the 168gr be long enough to seat out to the lands?