No this isn't a barn burner load for velocity, but I'll tell you what, it will shoot into under a half an inch in two .223's that I own. The others will group them into about an inch and a quarter. The key is to seat the bullet to just engage the lands of the throat for best accuracy results.
I have had mixed results shooting these and other powder combinations in the Ruger Mini 14 with cast bullets. Although accuracy has been good to excellent (for a mini) with cast bullets, there has been an issue of lead deposited in the gas port. I've found that the tip cleaners sold for use in oxy-acetylene torches work superbly for removing the lead from gas ports on many gas operated semi-autos. Not a real big deal unless you are working with a glass bedded national match Garand or something on that order.
A forum community dedicated to Sport shooters, owners and enthusiasts. Come join the discussion about optics, hand casting bullets, hunting, gunsmithing, styles, reviews, accessories, classifieds, and more!