I recently purchased a CSA Military Sporter in 7.62. I've put approximately 500 rounds through it so far and just recently noticed that the barrel is blistering and chipping under the lower handguard. In contacting Czechpoint (whom I purchased the rifle through) about this, they advised me that this is normal when the barrel gets very hot from shooting consecutive rounds 2 to 3 (30 round mags). Being new to the VZ58 rifle, this doesn't seem right to me; I own other AK47's and have shot more consecutive rounds/mags and never had the coating bubble and peel. Has anyone else experienced this same problem?