When Makarov�s are re-barreled the most common problem is fee ramp shape, and alignment; that could be the issue. If the barrel is mis-aligned the retaining pin will have to be-pulled, the barrel re-aligned and then drill a new oversize retaining pin hole. If the ramp isn�t shaped properly, then very careful work with a dremel can straighten things out; but it really helps to have another Makarov available to copy the shape.
