▁at ▁ranges ▁under ▁ 1 5 0 ▁yards . ▁Both ▁the ▁. 3 2 SL ▁and ▁. 3 5 SL ▁were ▁soon ▁su pers eded ▁by ▁the ▁introduction ▁of ▁the ▁more ▁powerful ▁. 3 5 1 SL ▁in ▁the ▁Win chester ▁' 0 7 . ▁ ▁When ▁first ▁introduced ▁however , ▁the ▁notable ▁fire arm ▁expert ▁Town send ▁Wh elen ▁noted ▁the ▁. 3 2 SL ▁cart ridge ▁as ▁displaying ▁similar ▁ball istics ▁as ▁the ▁. 3 2 - 4 0 ▁Win chester ▁black ▁pow der , ▁low - press ure ▁cart ridge . ▁He ▁further ▁suggests ▁the ▁best ▁use ▁of ▁the ▁. 3 2 ▁SL ▁as ▁being ▁for ▁rapid - fire ▁target ▁shooting ▁for ▁ranges ▁up ▁to ▁ 3 0 0 ▁yards . ▁Within ▁such ▁ranges , ▁it ▁is ▁quite ▁an ▁accurate ▁cart ridge . ▁ ▁In ▁October ▁ 1 9 4 0 . ▁an ▁Army ▁Or dn ance ▁circular ▁suggested ▁development ▁of ▁a ▁light ▁rif le ▁using ▁a ▁. 3 0 ▁cal iber ▁cart ridge ▁similar ▁to ▁the ▁" Win chester ▁Self - loading ▁Cart ridge , ▁C ali ber ▁. 3 2 " ▁to ▁replace ▁the ▁p istol ▁and ▁subm achine ▁gun . ▁This ▁led ▁to ▁the ▁production ▁of ▁the ▁" C ali ber ▁. 3 0 ▁SL , ▁M 1 " ▁cart ridge ▁directly ▁based ▁on ▁the ▁. 3 2 ▁SL ▁in ▁February ▁ 1 9 4 1 ▁and , ▁after ▁a ▁design ▁competition , ▁ad option ▁of ▁the ▁Win chester - des igned ▁M 1 ▁car bine ▁in