atchman2 my seal was shot from factory,had metal shaveing inbedded in it,a hole in edge,an enough more shaveing's in compression chamber to start another gun,it would shoot great 3 shot group's an then a flyer(I blamed myself for it)but now if it happen's, it is me,it can now shoot 10 shot group's just 1 large ragged hole at 20yd's(half the size of dime)an a tune will get rid of that dang twang also.