Can the tension on the slide of a 9mm pistol be adjusted? I don't have the hand strength in my left hand like I used to and find it very difficult to rack the first shell into the chamber and I would like to get it easier. I like the gun, just cant use it safely and am tired of getting my fingers pinched. Any help would be appreciated. I thought it would get easier with use but have put about 300 rounds through it but is still too hard.