Being the compassionate individual that I am when it comes to helping bewildered newbs I spent a good portion of this lovely Colorado day conducting a comparison between the Hornady Powder Cop and the RCBS Lock-Out Die. (This would have been posted sooner if not for the constant harassment by some GTR posters and the fact that I stopped to watch the NASCAR race. There's only so much I'll sacrifice for a newb.) The Powder Cop and RCBS accomplish basically the same thing, alert the loader to either a no powder or double powder condition. They do this is distinctly different ways however. As you can see, the two dies are similar in appearance but that is pretty much the only similarity. In this photo the Hornady Powder Cop is on the left and the RCBS Lock-Out die on the right. Both dies are screwed into Hornady LNL Quick Change bushings. The 'white plastic' foot seen on the Lock-Out die in the above photo is one of two supplied with the die. It is for cases starting at 9mm. The following photo shows both adapters, the larger one obviously used for cases such as .44, .45, etc. Removing the plastic foot once it has been installed is not an easy matter, it took the use of a pair of pliers to accomplish it and left scrape marks. Someone with stronger fingers might be able to do it without the use of a tool. I wonder just how long these 'feet' will last with frequent changing but knowing RCBS' customer service I suspect they would replace them with little trouble. Since the Powder Cop was already installed on my LNL's we'll start with that. It should be noted that I have Powder Cops installed on both my LNL'S and have been using them for over a year and have become very comfortable with them. Although I shall try to avoid unwanted personal bias in the review of both dies it is a natural reaction that at times is hard to avoid. In this photo you can see the Powder Cop installed in the station directly after the powder measure. Even though your tool head may be set up in a different configuration bot dies require that the follow the powder throw. With the Powder Cop nothing hangs below the bottom of the die. (Fine, the picture is fuzzy... sue me.) The Powder Cop operates on a very simple principal; if the powder charge is correct the center rod rises until a pre-set white 'O' ring appears even, (or where ever you set it) with the top of the die. The center rod has a series of indents in it for the 'O' ring to be placed and in conjunction of turning the die body up or down has an almost infinite range of adjustment. Although the next photo is a bit difficult to see, (include this one in your suit), it depicts how the rod looks with a correct charge. For my personal tastes I have it set so the top half of the 'O' ring protrudes just above the die top. I takes only a couple tenths of a grain variation to distinguish between a slightly low or slightly high charge. The next photo depicts a double charge of 3.6 grains of Bullseye. (I use as little as 2.5 for my grandson's .38 loads and 2.8 of HP 38 FOR MY .380 loads. The Powder Cop handles those reduced loads without problem.) A double charge is instantly recognizable and alerts the loader to a serious problem. After becoming familiar with using the die it is equally easy to identify when a charge is slightly low or slightly high and the loader is left with the decision if it is acceptable or not. Due to the amount of photos this review will take several postings. Don't start asking questions until I get them all done, you'll screw up my rhythm and I'll have to start over. (None of us wants that.) Continued on next posting. Wanna kill these ads? We can help!