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This Forster 0.258" neck bushing gives you a precise way to control neck tension on your reloads without overworking the brass. It drops into Forster's Bushing Bump Neck Sizing Die or Bushing Full Length Sizing Die, letting you size only the case neck to your exact spec while leaving the body fire-formed to your chamber. The 0.258 interior diameter is honed and heat treated to the number stamped on the bushing, so what you measure is what you get.
Neck bushings work off the wall thickness of your brass rather than the rifle chamber, which is what determines how far the bushing needs to size to land on the neck tension you want. The general rule is to pick a bushing roughly .002 inch under what a loaded round measures at the case neck, and since Forster offers them in .001 inch steps, you can fine-tune between sizes as your brass work-hardens over repeated firings. Using the least amount of bullet tension needed tends to produce the best accuracy, and this bushing makes those small adjustments easy.
Forster runs these bushings through a super-cooling cryogenic process after heat treating. That treatment refines and closes up the steel's surface, which is where the "smooth as silk" reputation comes from. A slicker interior means less drag on the neck, cleaner sizing, and loaded rounds with better concentricity and reduced runout. That consistency carries straight through to how your bullets seat and how your groups print.
One thing to keep in mind: Forster bushings are built specifically for Forster dies. They are not compatible with Redding or L.E. Wilson bushing dies, so this is the one to grab if you're already running a Forster bushing setup. Insert it chamfered side down into the top of the die body and you're ready to size.
This bushing is made for Forster's Bushing Bump Neck Sizing Die and Bushing Full Length Sizing Die. It drops in chamfered side down into the top of the die body. Keep in mind it is not compatible with Redding or L.E. Wilson bushing dies, so it needs to be paired with a Forster setup.
Measure the outside neck diameter of several loaded cartridges and use the smallest reading. A common starting point is choosing a bushing about .002 inch under that loaded neck measurement. As brass work-hardens after several firings, you may need to step down to a smaller bushing to keep the same bullet grip.
After heat treating, Forster runs the bushing through a super-cooling cryogenic process that refines and closes up the steel's surface. The result is a smoother interior that sizes necks with less drag. That slicker finish helps produce loaded rounds with better concentricity and less runout.
Yes, the whole point of a bushing is to let you dial in neck tension precisely. Since Forster offers them in .001 inch increments, you can fine-tune how much grip the neck has on the bullet. For the best accuracy, most reloaders aim for the least amount of tension that still holds the bullet securely.
| UPC | 757253998041 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | BUSH-258 |
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