Proper Priming Depth Adjustment on Load Master
Yes, you can get crushed primers or flipped primers with a Load Master if the priming depth is not set properly. If it is not deep enough you get a situation where the slider is moving while the primer seating pin is rising and it will catch on the pin causing the primer to tip, or in an extreme case, flip over.
If you crush one, you will feel it because it will take more effort than normal to raise the shell plate completely. Finish the stroke and immediately pull the case where it has rotated, in station 3. If the primer seating was faulty, you'll see it right there.
For a flipped primer you are only going to see it when you inspect the finished rounds.
If either of these things begins to happen, adjust the primer seating bolt by turning it out to make the seating be deeper. Go slowly--one wrench flat at a time. When the primers are seated correctly they are in the pocket about .001-.002" below the rim of the case and may look slightly flattened. You will find that you will have no more crushed or flipped primers.
Also, be very careful when switching back and forth between small and large primers. The only case I know where a primer detonated was when the user forgot to change the primer pin from small to large. The small primer seating pin acted like a firing pin on the large pistol primer--not good--
Finally, make sure the shell plate knob is tight so the plate doesn't wobble. Keep all grease and gunk off the priming assembly--keep it dry but if you must lube, use powdered graphite on the slider. And, as a rule, always check the case retainer on station 2 before starting a loading session. If it is open a bit then the case will not be in register for the primer pin to seat the primer. To get away from this, I deprime in station 1 and size, without the decapping pin, in station 2. The resizing die does a perfect job of holding the case in the right position. See darwin-te video on this on You Tube
http://www.youtube.com/user/DarwinTe
In his videos on the Load Master setup and operation you will find one that discusses setting the priming depth properly with dies in station 1 and station 2.