The only guess that counts is whether or not it will blow up your gun (and/or hurt someone) if you shoot someone else's reloads.

That would be foremost in my mind if I were to shoot those reloads; knowing myself, I would not be able to concentrate on my aim.

Not worth it in my opinion.

I've pulled bullets before and have reloaded them with fresh powder. Put them aside for "plinking" at the silhouette range but ended up not shooting them because I didn't want to run a few grungy, scratched up, dented bullets through my guns. Now I just dump what reloads I acquire into a bucket and give it away to someone else who will probably end up storing it in their garage like I used to do.

Again, not worth it in my opinion.