I like fast twist barrels for a bunch of reasons and I'm at a loss to understand why some folks have such an aversion to them. Spin drift is a constant that can be adjusted for with any degree of twist, and it is seldom that a fast twist barrel will degrade the accuracy of a medium weight bullet. But if you come across a very long bullet such as a heavy VLD or MK, the normally suggested 1:12 or 1:14 .308 won't cut it. My .308 wears a 28" 1:8 Krieger and I get a hair under 2700 fps with a 200 gr MK, (the throat is cut long so the bullet does not extend into the powder capacity of the case) so the fast twist doesn't appear to have a negative impact on velocity. Similarly my old .222 had a 1:7 Gaillard that would shoot tiny groups with 52 gr MKs even though I had acquired it to try some of the new heavy long range bullets that were beginning to appear. The only bullet this rifle would not shoot consistently were the thin skin varmint bullets like the Hornady SX and the Sierra Blitz, which in 50 gr would simply become a cloud of dust midway to the target, so the 52 gr Mk became my light bullet of choice.
Besides all that though, if you load a good quality bullet, a faster spinning bullet produces superior terminal performance. The explosive effect on varmints is increased, incidents of ricochets are decreased, and big game bullets penetrate deeper. With slower twist barrels though I have often had problems with bullets that failed to stabilize. The 107 gr MK will not stabilize in my 1:10 Lilja .243, never mind the 115 I'd like to try. The 240 gr Woodleigh will not stabilize in my wife's 1:12 .30/06. 53 gr TSXs will not stabilize in a 1:14 .22-250. If you are only going to shoot one bullet weight, then sure, pic the twist that is ideal for that bullet, but most of us want to use a wide selection of bullets for each cartridge we load for, and despite the fact that any twist will stabilize a wide range of bullet weights and styles, choosing a slow twist is more limiting to the range of bullets you can shoot than choosing a faster twist.
