I have recently had my .270 winchester re-barreled and the barrel used was one made some time back in the U.S by a person named Rick Carnes?, it is a hand cut and lapped barrel cut to .278" but rather than the usual 1-12" twist it has a fast 1:8", clearly made for a specific project. Ther rifle is a sporter weight the contour being something in the order of a #3, all up weight scoped is around the 9 lbs mark. Range tests to date with factory ammo in the bullet range 130 -150 grains but has not turned up and sort of grouping whatsoever, some of this may be down to a scope related problem that is to be checked out at the next range session. My question is this, given the fast twist of this barrel, what results may I expect from normal bullet weight for .270 calibre ammo, i.e 130 -150 grains, is the fast twist liable to be a detriment or, under certain conditions could it benefit accuracy? I hand-load for this calibre but have since the fitting of the new barrel only tried factory loaded ammo. I would welcome any thoughts on twist rates affecting accuracy.