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Re Re Re Re Re Re Re Replacing breechblock
Posted by Tony Beck on Thursday, 30 July 2020, at 2:36 p.m., in response to Re Re Re Re Re Re Replacing breechblock, posted by Robert H Herzog on Thursday, 30 July 2020, at 1:14 p.m.
There were a very few 45-70 6 groove barrels made for the 1878-79 Sandy Hook tests. Some of these were fast twist usually 1 in 18. Most 6 grooves were for Long Range Rifles, which are 45-80 2.4quot case. As Dick mentioned, these have very narrow lands and wide grooves known as Ballard rifling at the time. Those barrel usually have HG or HRG markings just ahead of the receiver.
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