The Hornady Pro-Jector is the predecessor of the Hornady Lock-n-Load AP. In some key aspects, the Pro-Jector shows better design features than the newer LnL, but it is much more sensitive to the alignment of parts, and that is the subject of this write-up.

• the primer punch cannot bind from spilled powder, avoiding the parts breakage that follows

• the steel ejector arm operation is reliable for all calibers

• the primer tube can be removed from the press with primers in it, and they cannot spill out

• quick die change system

• redesigned sub-plate for a case feeder

• redesiged press frame to mount a case feeder

• introduced a primer slide system, similar to the Star Progressive patented in 1933

• changing from large primers to small becomes easy, quick and reliable

The primer slide system is an improvement on the Pro-Jector, because it is quicker and easier to setup. Part of the tuning of the Pro-Jector involves correctly aligning the priming parts.

• the case ejector wire that replaced the ejector arm is tempermental

• the ejector nub machined into the base plate that replaced the ejector wire wears down relatively quickly, causing the press to bind up on ejection

• the primer tube cannot be removed from the press without the primers in it dropping out