My .20 is running a f,kin treat on Exacts mate. Give um a go. To be honest, us ‘inbetween’ Calibre lot are hard pressed to find anything decent, in that a mean plenty of choice, but of all the .20 I’ve tried, exacts set the standard.
Thinking out loud though, my .20 is US and they’re built on JSB, being German slash UK’ish, maybe H&N could be worth a go in your 100.
Keep us posted.