; ▁for ▁other , ▁particularly ▁older , ▁shot g uns , ▁serious ▁damage ▁to ▁the ▁bar rel ▁and ▁ch okes ▁can ▁occur . ▁And , ▁because ▁steel ▁is ▁l ighter ▁and ▁less ▁dense ▁than ▁lead , ▁larger ▁s ized ▁pel lets ▁must ▁be ▁used , ▁thus ▁reducing ▁the ▁number ▁of ▁pel lets ▁in ▁a ▁given ▁charge ▁of ▁shot ▁and ▁possibly ▁limit ing ▁patterns ▁on ▁the ▁target ; ▁other ▁form ulations , ▁e . g . ▁b ism uth , ▁do ▁not ▁present ▁this ▁dis ability . ▁ ▁Bl ended - met al : ▁Bul lets ▁made ▁using ▁cores ▁from ▁pow der ed ▁met als ▁other ▁than ▁lead ▁with ▁b inder ▁or ▁sometimes ▁s inter ed . ▁ ▁Fr ang ible : ▁Design ed ▁to ▁dis integr ate ▁into ▁tiny ▁particles ▁upon ▁impact ▁to ▁minim ize ▁their ▁pen etr ation ▁for ▁reasons ▁of ▁range ▁safety , ▁to ▁limit ▁environmental ▁impact , ▁or ▁to ▁limit ▁the ▁shoot - through ▁danger ▁behind ▁the ▁intended ▁target . ▁An ▁example ▁is ▁the ▁Glas er ▁Saf ety ▁Sl ug , ▁usually ▁a ▁p istol ▁cal iber ▁bullet ▁made ▁from ▁an ▁am alg am ▁of ▁lead ▁shot ▁and ▁a ▁hard ▁( and ▁thus ▁fr ang ible ) ▁pl astic ▁b inder ▁designed ▁to ▁pen et rate ▁a ▁human ▁target ▁and ▁release ▁its ▁component ▁shot ▁pel lets ▁without ▁exit ing ▁the ▁target . ▁ ▁Multiple ▁impact ▁bullet : ▁Bul lets ▁that ▁are ▁made ▁of ▁separate ▁sl ugs ▁that ▁fit ▁together ▁inside ▁the ▁cart ridge , ▁and ▁act ▁as ▁a ▁single ▁project