kwg,
Most of these guys have never shot the 45/120 3-1/4".
All you will ever need to know about the cartridge is in these two booklets. Volume I is 106 pages and Volume II is 71 pages.
Send me $45.00 (what I paid for them on 11/19/2009, I will include the receipt) and they are yours.
Chris
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Last edited by Sharps1874; 06/30/22.