I’ve been shooting my DW PM9 with American Eagle 124gr 9mm factory ammo (1150fps) with no issues for the past 6 months. Probably around 3k thru it by now. At my last steel match a few shooters were nice enough to give me a few of they're reloads and I am impressed by the difference in recoil. With one of the reloads I got 4 stove pipes out of 5. Very light load. (115gr @ 800’s FPS) Second reloads heavier load (124gr @900fps) and only got one. I’m researching reloading info now and will definitely be into it by the end of the year or next. But I’ve read about guys changing out they’re recoil springs. PM 9 comes with a 10# spring from what I understand. With a lighter load would I need a heavier spring or lighter one?