If you are referring to the escutcheon screw, they are weak. When I built my GPR flint kit, I was told to be careful with these screws. Too much pressure and they will snap and they did. Fortunately, Lyman included several extra screws in the kit. When they broke, I removed the broken part with a pair of needle nose and try again. From your picture, it appears that your barrel wedge is backwards. They should go from the right side (lock side) to the left. Of the two barrel wedges one is slightly longer and goes to the rear. I would contact Lyman for the screws. By the way, what caliber is it? I bought my .54 FPR percussion about 35 years ago and never had a problem. Liked it so much, when I retired my wife bought me the .54 GPR flint kit. You are going to love that rifle. Congradulations :thumbsup: