The Firing Line Forums - View Single Post - Need tips for accurate loading of 357 Sig

918v · January 31, 2006, 10:39 PM

You can always take some emery paper to your expander ball, spin it in a drill and reduce it's diameter by .001" or so. That will give you a tighter neck. Or, you could size w/o the expanderball, and see if you can still seat a bullet. This will give you the tightest neck tension. You may have to chamfer the case mouth a little more, however. Finally, there is the Lyman M-Die. It is a 2-step expander where you can just slightly kiss the case mouth with the shoulder seperating the two diameters, and this might give you the ideal tension. In any case, it is imperative that the bullets measure at least .355" and the inside of the case neck is sterile. A dirty expander will mess-up your efforts, so keep that clean as well.

January 31, 2006, 10:39 PM	#23
918v Junior member Join Date: September 25, 2005 Posts: 1,372	You can always take some emery paper to your expander ball, spin it in a drill and reduce it's diameter by .001" or so. That will give you a tighter neck. Or, you could size w/o the expanderball, and see if you can still seat a bullet. This will give you the tightest neck tension. You may have to chamfer the case mouth a little more, however. Finally, there is the Lyman M-Die. It is a 2-step expander where you can just slightly kiss the case mouth with the shoulder seperating the two diameters, and this might give you the ideal tension. In any case, it is imperative that the bullets measure at least .355" and the inside of the case neck is sterile. A dirty expander will mess-up your efforts, so keep that clean as well.