I started my 10mm journey with a S&W 1006. I followed shortly with a glock20SF. The next item in short order was reloading equipment...
I have been shooting a weekly IDPA match at one of the local ranges since late November. During that time I have shot 45acp, 10mm, and .40. Out of 2 separate g22 .40 cal guns I have yet to have any feeding or ejection problems. My 1911 and g20 both have random gremlins that sneak up, especially with fast powder and light load combinations. I have come to realize that both will require tuning to an unknown extent if I want to run them competitively in matches.
That said, put the gun/ competition conversation to the side, the 10mm is fun to reload. The cartridge can be whatever you want. Glocktalk 10mm reloading board has a lot of guys with 10mm reload specific experience. One of them has been scouring the web and compiling every 10mm load he can find, he keeps it in a shared google doc for all to see. My go-to load is 180g XTP JHP(or Magnus J134 which is a cheap twin), 10.4g of BlueDot, loaded to 1.25 COAL, with a CCI LPP or WLP.