🚀 go-pugleaf

Thanks for the pointer. I changed maker.ini to include DisplayUsingPrinterMetrics=on rather than off as the article advises. This makes the bold smallcaps text display (barely) slightly wider, rather than narrower, which is an improvement and probably matches the printout width. 
The characters are still not bold, however. 

Another related article suggests fooling with the monitor size settings. I changed mine from "Default" to 19" and the bold does show up at 100%. (It disappears at 80% zoom in that mode) Online help warns that if the monitor setting is changed, there may be problems with OLE links (and I use a lot of OLE-linked Visio pictures) so I'm wary of this solution. 

Additional experimentation shows that if I set the "stretch" value to 100.01% instead of 100.0%, the bold shows up. Perhaps the best workaround is to create a BoldSmallCaps character tag with that slight variation?