Objective
This tool is designed to mount in a Lee Precision single stage reloading press, as well as most single stage presses compatible with Lee Precision dies and shell holders. When used properly it allows the operator to make consistent and concentric roll crimp shotshells.
Construction
This tool consists of a number of components including a hull holder/base, spindle, crank, die and knob.
Beginning with the hull holder/base, this is made from aluminum and designed to fit inside the ram of a standard Lee Precision single stage press. Downwards pressure from the spindle combined with the relative flexibility of aluminum serve to keep the hull steady and prevent it from spinning.
The spindle is made from stainless steel and features a solid state, graduated helical groove pattern designed to bend and fold the hull mouth inwards without requiring expensive and unreliable bearings. As the entire spindle and crimp tip have no moving parts, very little lubrication is required and there is no possibility of things seizing due to dried grease or corrosion.
The crank is made from stainless steel and connects to the spindle and knob using standard machine screws.
The die is made from stainless steel threaded to mount in a standard 7/8-14 threaded reloading press. It serves to hold and steady the spindle, ensuring consistent, level contact with the hull mouth during operation.
The knob is made from ABS plastic with a counter sunk mounting hole to reduce friction and ensure comfortable operation for the user.
Every part of this tool is made from stainless steel, aluminum or ABS, ensuring it will resist corrosion and wear virtually forever so long as it’s not abused.
Installation
To install this tool, the operator will begin by slotting the hull holder/base into the ram of their Lee Precision single stage press. When doing so, care must be taken to ensure the stabilizing portion of the base is properly aligned with the ram’s primer arm channel.
Next, the user threads the die into the press until flush. Standard reloading die spacer nuts can be employer if the operator experiences any clearance issues.
Finally, the operator will slide the spindle up through the die from the bottom, securing it in place with the crank from above.
Operation
The operator will begin by slotting a shotshell into the hull holder/base and raising the ram until the hull mouth meets the bottom of the spindle.
Next, the user will manually operate the crank while slowly raising the ram. As this tool does not employ moving bearings in the crimp bit, it can be operated without the use of power tools/drill press using only very low speed and pressure.
Once the proper shell length has been reached, the operator removes and inspects the shotshell.
The roll crimper can be used with or without lubrication without fear of damaging hulls.
Materials
This tool works with conventional plastic or paper shotshells.
Summary
Shotshells roll-crimped using this tool feature professional looking, level and concentric crimps with smooth edges consistent with factory ammunition.