I sure agree that lighter bullets may solve the problem and you can do this by removing some weight from your current bullets.....try putting them in a lathe and turning them into large cavity hollow points....there are other ways as well but hollow points are the easiest to do. If this don't work, and depending on your love for the gun and special arts you can have the front sight welded up and then recontoured by filing a new higher front sight. You need about .058 increase in your front sight height and a bit of oxpho blue to touch it up. A good man with a tig torch can do this fairly well, the recontouring is artsy but can be done. You can confirm the .058 number by lightly tapping a lead BB shot until it's that height and then using some CA glue and accelerant lightly attach it to the existing front sight. This can be removed fairly easily later by lightly tapping it off. (or use a wood chisel) I've done this twice with good success.
