good bench, looks like its similar to the plans out on the web that some reloading association has. Mine is similar. Bolt that sucker to the wall studs and its a rock.
+1 on bolting to wall. I made a rather complicated top to my workbench by laminating seventeen eight-foot-long 2x4s. It's quite heavy. But it still wobbled when reloading. Bolting it to the wall fixed that. It also made seating primers more consistent.