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HiBC · October 11, 2013, 04:36 AM

Another possibility.

Your press is springing.

when the ram is at the top of its stroke when you are sizing

see if you can fit a .004 or .005 feeler gage or shim between the shellholder and die when it is under full load.

October 11, 2013, 04:36 AM	#42
HiBC Senior Member Join Date: November 13, 2006 Posts: 8,288	Another possibility. Your press is springing. when the ram is at the top of its stroke when you are sizing see if you can fit a .004 or .005 feeler gage or shim between the shellholder and die when it is under full load.