Just bought a new Shield 9mm. Had a vey hard time locking the slide Back. Hoping it will get easier the more I shoot it. I'm attributing this problem to stiff springs and not broken in?? Anyway when I finally got it to lock it back, I'm letting it stay in the lock position overnight hoping it will loosen the recoil spring a tad! Anyone else have lock sliding issues with there shield?? If so what's the cure or does she just need to be shot?? Like guns, love people!!