I have used the hornady, frankford arsenal, and now the primafill primer loaders in that order. The hornady would not load large winchester primers no matter what mod I tried. The frankford was the same result with the winchester primers, only worse. Then I bought the DAA primafill. It loaded small primers, but not the large winchester primers again. But once I used a vld reamer, or chamfer, on my dillon tubes the winchester primers flew in the tube. So I chamfered all my large dillon tubes and no hicups with the winchester large primers. After doing some research on the net I found out that a lot of people were having problems with winchester primers with whatever loader they were using. Well, the primafill now handles winchester primers perfectly, every time. I couldn't be happier, especially after fighting to find something that will handle large primers for the past year. I also put a slight vld chamfer on all my small dillon primer tubes to make the primers fall in even faster. I would highly recommend the primafill to anyone who doesn't want hand peck to fill their primer tubes.