Answer:
Most of these cartridges (TW 53, SL 43, FN 53, LC 51, MKE 64, RV(E) 49, Chinese blank) have corrosive (potassium perchlorate mix) primers. You will have to scrupulously clean your Barrett with water based bore solvents to avoid lasting damage. Every component surface exposed to gun gas - barrel, bolt, firing pin, receiver interior, magazine lips, magazine follower, etc.
The LC 19 and ת צ 74 are non corrosive.