And again such a small amount of almost the same powder , if it was a fast powder with a slow I might toss but 2 almost the same burn rate and as said above to all who wont then dont its your powder your time, but as has been pointed out do not shoot pull down powder either then as a lot of us older casters and reloaders did and still do , this is like a duplex thread all those who have never worked up loads in calibers with powders that little or no data exist for , I suppose it is the same at the powder companies , someone has to work up the data and have a clue as to how , but that has been pointed out to already , start with faster data use caution and use it for plinking ammo , so do not use pistol powders for cast rifle as so many of us do , do not buy any powder but what there is data for for that current batch and lot number and I suggest some should shoot only factory loads , I will still use surplus and I will duplex as I see fit , I will also shoot pistol powders with cast rifle , your call and if you have to much toss it . Now you and only you can make such a decision as to safe or unsafe .