I was shooting the steel target match at the TCA show. Shot the first round and won. The gun was right on. Started shooting the second round and after dispatching 2 or 3 plates couldn'nt even find the rest. Attributed it to being a lousy shot. Started cleaning the gun Sat. Night and discovered the bulge about 2 inches behind compensator. I had been shooting new Samson I.M.I. factory ammo.