Description Medium burning powder well suited for a wide range of rifle calibers. Long a favorite of Jack O'Connor in the .220 Swift IMR 4064 is one of the more versatile powders in the rifle powder line. Firearms, trailers, and some accessories are only available for purchase in stores. Each location follows all BATF and individual state/county/city laws to insure the desired product is legal for sale. Any info provided online is subject to change, please go to your local store for more accurate information.