I use a #30 drill bit @ .128 for 1/8" holes (.125). I have carbide drill bits in one size bigger than the standard sizes. If using a 3/32 (.094) pin I will use a #41 drill bit (,096) all the way up to 1/4" (.250) I use a 6.5mm drill bit (.255) or a letter drill "F" at .257. it gives you some leeway when peening pins, but peening is also a learned skill, how far and how much to smack the pin for a domed head. I do not ever peen my handles. Guards and bolsters yes, but not a possibly brittle wood. G10 can take some over peening as well as some
some other synthetics can. Beyond this I cannot help except to use a slightly larger hole. Here is a conversion chart for drill bits. Very handy. Grainger carries carbide drill bits a lot cheaper than MSC usually if you want to drill hardened tangs.
http://www.csgnetwork.com/drillsizeconvert.html
https://www.grainger.com/?gclid=CMOb...170328084052:s