I've never used anything but iron pins (real or fake) whether the inlay is brass or silver. I USED to use fake pins. I would use VERY small wood screws, put a light counter sink on the inlay, run them in, then file the head off. VERY strong but left a larger diameter pin showing than I liked. For the last few years I've been useing pins made from finishing nails. I take the very small finishing nails, the ones that are about 1/2" long (I think they're the smallest you can get) and nip them off at about 1/4". Then drill a hole just the right size for the shank in a piece of 1/8" steel and counter sink it. Put the nail in and swage the head into the CS. This gives a very nice head to work with that will match perfectly the CS you will put on the inlay. I then take my side cutters and just squeeze the shank in a few places to put ridges so it holds better then drive them in and file off the head. When I drill the hole in the inlay, I first drill the hole with the smallest bit I have, much smaller than the pin, Then open up the hole in the inlay with the same bit I used to make the swage block and CS. The little pilot hole acts as a guide to ensure that the pin goes in straight. I often touch the tip of the pin to a fine grinder to give it a point because by nipping the end off with side cutters gives it a kinda fishtail tip that may not fit through the whole in the swage block.
Cody