I have an M&P 1.0 w/Apex trigger kit, Faxon barrel & compensator and a 12 lb recoil spring in hopes of it firing 115 gr range ammo. I believe they originally have a 15 lb spring which would handle 124 gr fine, but hit or miss on 115 gr. I then tried a 14 lb which was hit or miss on extraction/ chambering next round and now a 12 lb which seems to cycle better but now I'm getting about 2 light strikes per 50 rounds of either weight. The striker and spring are new stock replacements. Another thing I noticed is when unloaded the slide is snug, but when chambered it can easily come out of battery with 2 fingers grabbing the slide. Is my problem being too light of a recoil spring leading to light strikes? Also, no light strikes before the 12 lb spring.