I was shooting today using my 6" gp100 357. Normally I shoot white bullseye at 25 yards without problems. Today I changed targets to black bullseye at the same distance and had a hard time with sight alignment. I think with my old eyes and black sights and bullseye I need to change the front sight ( note: dim lighting in door range). My question is, will these sights hold up or should I try a different front sight?