Stainless Expanding and Neck-Up Mandrels

This mandrel measures a nominal 0.243". Our normal expander mandrels measure .001" under bullet diameter. Over the years, we have had many requests for an expander mandrel that is the same as bullet diameter. Our Neck Expanding Mandrels are designed to...

We've made so many custom carbide expander mandrels in .3076" diameter that we decided to make a special run of stainless steel expanders at that dimension. For those tough to expand cartridges.