▁to ▁the ▁. 3 0 0 ▁H & H ▁Mag num ▁having ▁a ▁long ▁t aper ed ▁body ▁while ▁the ▁. 3 0 0 ▁R ug er ▁Comp act ▁Mag num ▁follows ▁modern ▁cart ridge ▁designs ▁in ▁that ▁it ▁has ▁very ▁little ▁t aper ▁and ▁a ▁sh ar per ▁shoulder . ▁The ▁dimension ed ▁drawing ▁is ▁of ▁the ▁parent ▁case ▁. 3 7 5 ▁R ug er . ▁ ▁Performance ▁ ▁Horn ady ▁manufact ures ▁am mun ition ▁for ▁the ▁. 3 0 0 ▁R ug er ▁Comp act ▁Mag num ▁cart ridge . ▁The ▁Horn ady ▁Super formance ▁Am mun ition ▁drives ▁a ▁Horn ady ▁ ▁Inter b ond ▁or ▁S ST ▁bullet ▁at ▁ ▁and ▁the ▁ ▁S ST ▁bul lets ▁at ▁. ▁The . 3 0 0 ▁R ug er ▁Comp act ▁Mag num ' s ▁greater ▁case ▁capacity , ▁and ▁the ▁" short ▁fat " ▁cart ridge ▁efficiency ▁lead ▁to ▁increases ▁in ▁the ▁neighborhood ▁of ▁ 1 5 0 ▁f ps ▁over ▁the ▁H & H ▁cart ridge ▁and ▁is ▁essentially ▁the ▁same ▁performance ▁as ▁the ▁. 3 0 0 ▁Win chester ▁Mag num ▁or ▁. 3 0 0 ▁W SM . ▁ ▁See ▁also ▁▁ ▁Table ▁of ▁hand gun ▁and ▁rif le ▁cart rid ges ▁ ▁References ▁▁ ▁C . I . P . ▁T D CC ▁( Tables ▁of ▁Dim ensions ▁of ▁Cart rid ges ▁and ▁Ch amb ers ) ▁. 3 0 0 ▁R CM ▁ ▁Category : St urm , ▁R ug er ▁& ▁Company