August 15th, 2016

Drop-Port Actions — Stiller’s Slick Innovation

Stiller Drop-Port

Many of you may not have seen how Jerry Stiller’s innovative Drop-Port works with a 6BR, PPC, or Dasher case. Stiller Precision has created one slick system. Just retract the bolt and your case exits, nose-first, through a small port, coming to rest right under the gun. It works by gravity alone so you don’t need a conventional ejector, with the case alignment issues an ejector can create. (An ejector pushes on one side of the rim — this can push the case out of “perfect” alignment.) While Drop-port technology could, potentially, work with nearly any size cartridge, at this time, Drop-ports are only offered for PPC, 6BR, and Dasher-sized cases. Your Editor has a Drop-Port Viper action used with the 6mm BRDX cartridge, which is similar to a Dasher but with a slightly longer neck. It works flawlessly. Our Belgian friend David Bergen was kind enough to video his Viper Drop-Port in action:

Currently, the Drop-port system is available with the Viper action (both aluminum and stainless), and the round-profile Diamondback actions (but expect to wait a LONG time if you want the flat-bottomed Viper action). Because of the nature of Drop-port geometry, this system is optimized for short-length benchrest cartridges such as the 220 Russian, 22 and 6mm PPC, 6mmBR, and the 6mmBR Improved (Dasher, BRX, BRDX). If you plan to use a Drop-port with a Dasher or other improved case, you should tell Stiller Precision when you order. Also, if your gunsmith has not built a Drop-port rifle before, he should first consult with Stiller Precision, (972) 429-5000, to ensure the exit port is placed and inletted correctly in the stock. Getting the geometry exactly right is critical with this system.