Not really. I noticed when I broke the seal. Some were nice and charcoal black. Others looked like a grey and black mix.
Later today I went back and loaded my cva optima with the white hot pellets , using the same winchester primers and it shot nice and crisp.
I think the 777 pellets went bad. I had them in the house never opened so im not sure if they were bad when I got them or not. I wont return them to the store because I have had them for about a year.
however, I shot pyrodex in my old sidelock for many years and I had some for 25 years in a used but sealed can. I had it in my shop. It burned nice and hot when I got rid of it. Not trying to say which powder is best. I just want it to shoot if a buck steps out...