Setting up the die requires unthreading a cap screw to release pressure on the spring, turning the die into a press until it contacts the raised shell holder, raising the die a quarter turn from touching the shell holder, turning down the lock ring against the press and locking the ring with the brass set screw. However, cases must still be lubricated to eject from the die. The S3 Reload sizing die includes a carbide sizing ring. The S3 Reload sizing/decapping die incorporates a polymer spring to push NAS3 cases out of the die. 01 inch larger than a standard small pistol primer flash hole. Near as I can measure, the flash hole of NAS3 cases is. Shell Shock says this “eliminates back-face pressure” and enables more hot metal particles from lead-free primers to ignite powder. NAS3 cases have a cone-shaped and slightly larger flash hole than brass cases. As deep as the jaws of my caliper could reach into cases, the wall thickness of NAS3 cases measured. 012 inch for NAS3, SIG and Winchester 9mm cases. The average weight, weight variation and water capacity of 10 each of three brands of cases are listed in Table 1.Ĭase mouth wall thickness was the same. However, NAS3 and regular brass cases were similar in capacity. Shell Shock states the cases have a one- to 2-percent larger internal volume than brass cases. That should translate into less internal capacity for NAS3 cases compared to regular brass cases. This is due to the construction of the cases with a flange on the bottom of the body swaged onto the aluminum head of the case to lock the two together. The web of NAS3 cases is slightly higher than regular brass 9mm cases. I compared NAS3 cases to SIG and Winchester 9mm brass cases. ![]() S3 Reload sells a special sizing/decapping die (left) and a mouth flaring die (right).
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