Tapered expander pin for rifle cartridges

[wmitty]

I use tapered pins held in a .30 cal collet to expand case necks to allow the cast boolits to be seated. I use 5/16 “ bolts and turn them in a drill motor with a flat file. .30 cal, 7 mm, .22 cal and turned a 3/8 “ bolt down to fit the .30 collet for a .375 expander. My question regards the neck tension obtained by using a tapered pin rather than a straight pin type expander such as a Lyman M die. I’m expanding the case mouth to the point of barely allowing the gas check to enter the neck. Does this allow enough neck tension for good ignition of the powder charge?

[country gent]

I use a home made die and tapered expanders ( Mine are turned from 1/2" 0-1) on cartridges I neck turn, The tapered expander is also the spud for my neck turners. I expand on it the use it to center the cutters when neck turning. I do need to lube the case necks doing this. I normally use bushing dies for loading and only size to what I need

[Dieselhorses]

Maybe you already knew but Lee offers a universal expanding die that will fit most calibers. Bear in mind, a mild taper crimp wouldn't hurt contrary to what many say if you are worried about pressure.



https://leeprecision.com/universal-c...nding-die.html