IIRC, Rustynuts has a Load-Master.
As you may know, or are now finding out, when the Load-Master priming system needs maintenance, it can start tipping primers, and even flipping them upside down.
I recently had to diagnose mine, when that started happening--it turns out that the primary problem was that I had not returned the #2 (primer) case retainer clip to the proper position. That seemed to cause a slight misalignment of the case over the primer insertion hole, even though I use a five-die setup (e.g., decap only in #1, resize only in #2).
Start by 1) confirming that the case retainer clip is pulled in. To set it, simply pull it in too far and cycle a case; that will push it back out to the proper point.
2. confirming the Primer subsystem is clean--all of it, from the primer anvil and spring on up through the trough.
3. If the slider is at all damaged, replace it. Make sure the slider is burr-free and undamaged. If you don't have a spare set of parts for all the primer subsystem pieces, order some up from Lee.
4. Personally, I recommend a five die configuration to help make priming trouble free--put a Lee universal decapper in #1, then a Lee sizer / decapper die without the decapping rod in #2.
Adjust both to the same depth--mysetup works best following the Lee directions--e.g., firm contact on the ram, plus 1/4 turn, then tighten the nuts up.
Now that you're heading into routine maintenance on the Load-Master, be sure the check out the LoadMastervideos.com forum. DarwinT set it up, and all the videos are there, plus the motley assortment of LoadMaster freaks check it frequently, eager to help.
Jim H.