I have use Quickload since it came out and have never forgot the main thing they tell you, back the results up with printed data, which I always do!!! I have seen hundreds of load workups that show as good when they are actually way over the limit. Be VERY careful when using QuickLoads unless you have a firm grip on ballistics and the physics of them. Sierra bullets investigated the data UNTIL they found many discrepancies then dropped its information totally.