I never run my rifles hot enough that it would matter. But if you use the red and then later try to remove it, be prepared for a little cussing. You will have to heat the crap out of it and I have that even heat fail to loosen it up as much as I wished. If you shoot your rifle FA or just burn the shit out if then maybe, and I mean MAYBE the blue would break down, but I've shot thousands and thousands of rounds through my ARs and Blue has never let me down. Uless you plan on going into combat or are one of those guys who thinks Armagedon is right around the corner and you are going to have to shoot non-stop to stop the Zombie hords, IMO you'll never need the Red stuff. And I must admit, I have bump fired the crap out of my 7.5 inch pistol and its set screw on block has never loosened up with Blue.