Commercial die manufacturers have no set standards for the Expander ball in their dies. Large variations from manufacturing to manufacturing and even within a given manufacturing makes it necessary to properly size the inside diameter before seating. 

We recommend removing the expander ball completely from your resizing dies. Your last step before adding powder will be to expand your necks using the appropriate expander mandrel. You don't have to use dry neck lube before expanding your necks. We use a single stage press to seat the primer and expand the neck on the down stroke, then we pack the "ready for powder" brass into our APW reloading trays.

The Die body fits your normal reloading press and the interchangeable Mandrels are sized to precise dimensions. The kit includes mandrels for running 0,001 or 0,002" neck tension as well as a base to keep everything in place while not in use.

The AWP Expander Mandrel will smooth out and slightly expand the case neck so the brass will be ready for consistent neck tension. You don't have to use dry neck lube before expanding your necks. We have found this is the easiest method to greatly reduce your extreme spread (ES) and standard deviation (SD) numbers.

The complete set includes: 

224Cal
0.223

0.222

243 Cal (6mm)
0.242

0.241

264 Cal (6.5mm)
0.263

0.262

284 Cal (7mm)
0.283

0.282

30 Cal (308)
0.307

0.306

338 Cal
0.337

0.336

Custom calibers can be ordered at R350 per Mandrel.