I think double charge is the most serious issue in reloading. This has to be and needs to be the #1 Concern to folks new to reloading. I am hoping to gather experienced reloaders' comments and techniques to limit the chance of this happening. I think of two avenues: 1. Reloading process - what you do in reloading process to guard against Double Charge. 2. Quality Control - how do you find Double Charge cartridges AFTER the bullet has already crimped on the case. On #1. Eliminate distractions, like cell phone calls. Got to stay on the groove. Don't get distracted. I also make it a habit to glance at the filled case to see the powder level. Until we have a smart reloader to "yell" at us when there's double charge, we'd have to use our eyes. On #2. I weigh all finished rounds to see if there's an unreasonable jump in weights. It would take too much time to weigh each round, so I'd do that in groups of 4. Their total weight, say 752gr, should only vary by a few grains due to differences in case weights, but should never vary by 8-10gr. Quality control is your last chance to catch Double Charge. Hope this helps. Please suggest your techniques.