My 4 inch 617's blade was .160 high. I replaced it with a Jack Weigand rear blade of the same height but with a wider notch of .140. With a 6 o'clock hold, my 617 prints in the x-ring of the 50ft. NRA Slow Fire Pistol Target (B-2). That target has a 3 1/16" black center. It shot similar groups with the original blade. The wider notch just makes it easier to acquire a clear sight picture with my old eyes. Neither the new or old sight is/was bottomed out elevation wise......
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'Nam 1968-69.DAV,VFW,NRA Inst.
Last edited by one eye joe; 04-01-2012 at 03:49 PM.
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