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This is the genuine Forster small primer seater assembly, the same 0.175" diameter part that handles small rifle and small pistol primers on the Co-Ax single stage press. If your original has worn, bent, or just walked off the bench, this drops right back in and gets your priming station working the way it should. It carries Forster part number 028271-101 and threads straight into the press with no fitting or modification needed.
What makes the Co-Ax priming setup worth keeping dialed in is the fit between parts. The primer post rides in its channel with very little clearance, and that tight tolerance is what gives you the same seating depth stroke after stroke. Because of how the press is built, it pushes the primer to a consistent spot below the case head regardless of small differences in rim thickness or how much muscle you put into the handle, which is a big reason a lot of reloaders trust this press for precision ammo.
Small and large primers use different diameter seater assemblies, and running the wrong one leads to sloppy seating or jams. This small unit is matched to small primers at 0.175" across, while the large version steps up to 0.210". Having the correct assembly in place is the difference between primers that seat clean and flush and ones that fight you.
Parts like this are worth having on the shelf before you need them. It is a straightforward, machined steel replacement built by Forster for their own press, so there is no guessing on compatibility or quality. Swap it in, adjust the jaws for your cartridge, and you are back to loading. For anyone who shoots a mix of small and large primer cartridges, keeping both seater assemblies handy makes switching over quick and painless.
It is made for the Forster Co-Ax single stage reloading press. This is the factory replacement part, so it threads right into the priming station with no modification. Just make sure your press uses the standard Co-Ax priming setup.
The small assembly measures 0.175" in diameter and handles small rifle and small pistol primers, while the large assembly is 0.210" for large primers. You pick the one that matches the primer you are seating. Many reloaders keep both on hand so they can switch between cartridges quickly.
No, this is just the small primer seater assembly itself (part 028271-101). It is a replacement or spare part for the press, not a full priming kit. If you need other Co-Ax components, those are sold separately.
Parts can wear, bend, or get lost over years of use, and the tight tolerance on this piece is what gives the Co-Ax its consistent seating depth. Keeping a spare on the shelf means you are not down for priming if something happens to the original. It installs quickly and gets the press back to factory condition.
| UPC | 757253996535 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 028271-101 |
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