At the point of ignition, brass must expand properly to release the bullet. Failure to have adequate clearance can ruin rifles and may even cause injury.
It is important, when prepping the case, to ream excess brass from the inside case neck wall, as well as the “dreaded donut” of material that can accumulate after repeated firings. The Forster Neck Reamer attaches to the Case Trimmer to remove excess brass from inside the case neck wall. Use after the cases have been fired with a full load and before the neck or full-length sizing operation.
Then, after you have resized and expanded the case neck, return it to your Case Trimmer and use the Outside Neck Turner to remove excess brass from the outside neck wall. This process produces neck walls of uniform thickness and an exact outside neck diameter.
Tip - In terms of improved accuracy, no single reloading function provides a greater return on your time investment than turning eccentric case necks to a consistent wall thickness. If the brass is thicker on one side of the case than the other, the thin side releases the bullet first and causes a slight bullet-to-bore misalignment that can seriously impair accuracy.
(Also available separately is a Hand-held Outside Neck Turner, for use in the field without the need for a Case Trimmer. The Hand-held cutter and pilots, are not interchangeable with this Case Trimmer tool.)
InsideThe Neck Reamer mounts in the cutter of a Case Trimmer in place of the pilot and removes the excess brass from the neck walls.
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