A...uh...recent test pistol's trigger made me think that the eight pound scale might not be enough, so I finally broke down and splurged on a modern digital Lyman trigger pull gauge from BezosMart.
It has the advantage of giving output in pounds and ounces, rather than the eighth-of-a-pound hashmarks on the RCBS unit. Further, it can do a string of ten pulls and spit out an average. Handy!