Is bugler pure tobacco with no added nicotine or chemicals?

No, it has additives just like any other cig. Some old people swear that "the filters kill ya." Only cigs that claim to be all natural are non additive cigs (such as Winston non additives or any American spirit).

[While Natural American Spirit cigarettes claim to be natural and organic tobacco, the tobacco is organic but the cigarettes still have many of the same additives as other tobaccos, such as vinyl acetate, which is used in the papers to make them "Fire Safe Compliant"]