I've been reloading a long time on my trusty old Lyman single stage. I upgraded about a year ago to the Hornady LNL AP. After some tuning I have it running great. I have only one issue. I have the bullet feed die from Hornady with the collets and I have the BullyDog attachment so I can use 4 tubes and twist as they empty. As I run through the operation and get to the stage to drop a bullet and then next onto the seating die, the bullet shakes off or I have to guide it up by hand to seat. I have adjusted the feed die over and over to no avail. I tried playing with the RCBS expander die but still not solving it. If i adjust the expander too much the case mouth has too much bell to it. Is the issue just simply the Hornday feed die is a bad design or am I missing something?