Do you know for a fact that that is the only reason it is not approved for sidelocks or are you conjecturing that? I know it is not approved for certain inlines and that is not because of ignition problems it is because it blows the 209 primer apart. Ask Cayugad, he has had to dig part of a primer out of his face. So we see it does not act exactly like triple 7, the pressures develop differently.