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Old January 31, 2014, 10:40 AM   #54
Slamfire
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Join Date: May 27, 2007
Posts: 5,261
You can find 1950's articles on the introduction of the microgroove barrel. So microgroove was used in rimfires, but I don't think there was any expectation that for the centerfire versions the factory ever considered lead bullets.

Marlin went to a new broaching method, increased the number of grooves, and the claims for the period were with jacketed.

While there are vocal cast bullet shooters, they are a tiny fraction of the actual users of 30-30's. The average user is someone who buys their ammunition from a Country Store/ Gas Station and goes hunting with the rifle. They don't reload and seldom clean the things.
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Last edited by Slamfire; January 31, 2014 at 11:20 AM.
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