Traditional bullet lubricating methods of placing lube only in the grooves are inferior to the modern method of coating the entire bullet with Lee liquid alox. This places the lube where needed, on the surfaces that rub against the bore. All lead bullets must be lubricated, but it is not absolutely necessary to size all cast bullets. Bullets must be sized if they are so large that they expand the case too much to freely enter the gun's chamber. Sizing sometimes helps accuracy by making the bullet uniform in diameter. This insures uniform start pressure and better accuracy. Gas checks can be installed with this tool. Simply place gas check on base of bullet before sizing. Features: For rifle and hot handgun loads, it is best to re-lube the bullets to insure the sized portion is recoated 284 bullet sizing kit sizes cast bullets, also seats and crimps gas checks, fits any standard 7/8-14 thread reloading press