Only time I shot someone else's reloads is when I bought my Savage 6BR benchrest gun at a lgs. About 100 reloads came with the package when the owner had an injury that prevented him from competing any longer. My lgs guy knows the previous owner personally and convinced me that I should at least consider it. After pulling a handful of rounds and finding them very exact on everything measurable I did go ahead and shoot them and they were fantastic and gave me a great place to start. Otherwise NO, I wouldn't shoot someone else's reloads.