I bought a SC O3-A3 that is in fine shape. It has a 4 groove barrel. I have been told that these also were made with 2 groove barrels, but that those are rare and seldom seen. Also that some 6 groove barrels were made, but those too are rarely seen. Somewhat confusing is that barrels for SC were made by Hi Standard and that some of them were also made by Savage Arms which supposedly had some link to Hi Standard during the war years. Is this all fact and is there a time line related to the use of these barrels in the SC rifle production? Thanks for any info you can supply. JC
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