So, last night I started, for the first time, to reload some ammo for my 10mm G20C . I use Vihtavuori N340 powder with 180gr TMJ (not full metal jacked) bullets. Looking at the official Vih tables, I should go between 6 and 6,5 grains, but my armourer shop gave me another table where it stated that I could range from 5,5 to 7,4 grains. I decided, anyway, to make two different loads: 6,2 and 6,7 grains (which correspond, respectively, to the .66 and .71 holes of the auto-disk of the Lee Deluxe Reloading pistol kit). With BOTH of the loads, when I went shooting today at the range, the slide of the gun NEVER rested open at the end of the rounds... it ALWAYS closed back... --> Am I using too soft loads? What could be the problem?? Please note that I installed a NY1 trigger spring, but I should have done the whole reassembly procedure perfectly! Your help is very much appreciated guys! thanks!!