...and the key to dealing with used primers is to drill a hole in the benchtop under the press, then attach a jar to the benchtop bottom.
Now, using a peanut butter (90mm dia, plastic) jar, carefully locate the jar top and mount it--when I did it recently, it was held on by the back press bolt, and two small (1/2") SM screws with washers.
A 1" hole fits nicely between the press mounting bolts. Drill the bench hole and cut through the jar top. Screw on the jar--and voila!--a used primer catcher that can be easily emptied.
Jim H.