I load my cases exactly like Larry P. does - load up a loading block full of cases and run them under an RCBS Uniflow row after row. I also, religiously, check each and every case under a light.
I don't just glance in each case checking for a possible double charge, I view the powder in each case at a certain angle that varies depending on the amount of powder in the cases. When viewed at an angle, I see a small crescent of powder in a case. If I don't see the same relative amount of powder in each case, I not only know if there is too much powder in the case, I can also determine if there is too little. The latter has happened rarely when a temporary powder bridge has formed in the Uniflow and a case might get a smaller charge than required.
Now, having said that, I do see the logic of mallc's method. By charging one case at a time, that is, picking up one empty case from a bin, charging it, and then placing it in the loading block, there can be no doubt that all the cases in the block are filled with one and only one charge of powder. I can't buy the "what if I'm interrupted?" argument because if one is interrupted, they will inevitably finish the case they are working on and place it in the block. I don't see how anyone could load a case and place it back in the empties bin or set it down other than in the block. If the interruption is so severe that that isn't done, then the whole set should be emptied and started over after the earthquake has settled.
I would, however, take him up on the time challenge.
I don't think anyone can load a group of cases (say 50) using his method any faster than using my (or Larry P.'s) method for this reason - I can load a block with empty cases very fast because I'm not worrying about spilling any powder if one slips or one falls on the floor, etc. With his method, each case being placed in the block is full of powder and it is a natural tendency to take a little extra care and therefore a little extra time placing it in the block. 50 of those little bits of extra time add up.
Now, having said
all that, I don't plan to change my method even though mallc's reasoning is sound. I won't change for this reason - when I am loading using the Uniflow, I get in a steady rhythm of both consistent hand movement and
consistent sound of the charging handle. When all 50 cases are loaded in quick succession instead of being interrupted 50 times by reaching for an empty and then placing the charged case in the block, I am noticeably more consistent with charge weights. I listen for a "click-swish-click" as the handle hits the upstop, rotates, and then hits the downstop. If something goes slightly off, I notice it much more easily than if there are several seconds in between each charging operation. Until you pay attention to the sound and timing of the charging operation itself, what I'm saying may sound silly and unnecessary. I don't think it is.