SAC Neck Sizing Bushings

(3 customer reviews)


With universal outside dimensions of .500″ diameter by .375″ height, these bushings can be used in MOST resizing dies. Contact us if you have questions.



Neck Sizing Bushings

Universal outside dimensions of .500″ diameter by .375″ height, these bushings can be used in MOST resizing dies.

Our neck resizing bushings have minimized neck runout in cartridge brass in nearly every die we have used them in. After attempting to eliminate and reduce neck runout in our sized brass using various commercially available neck bushings, we realized that every neck bushing has the same flaw, a straight, undersized hole when compared to the brass.

Think about trying to push a thin walled straight tube into an undersized straight hole, how can we expect our brass necks to magically be free of runout. Our new bushings address the inherent flaws with this system with all new internal bushing geometry designed to reduce neck runout while increasing loaded cartridge concentricity in the chamber.

Made from 17-4 H900 stainless steel, then processed with the same heat treat as our Precision Resizing Dies. Our neck bushings have an incredibly smooth inside finish paired with an extremely slick external finish from heat treat.

Additional information

Weight 2 oz
Dimensions 4 × 3 × 1 in

3 reviews for SAC Neck Sizing Bushings

  1. Steve (verified owner)

    The answer to reduced run out with redding s dies. Keeps cases very concentric compared to stock redding bushings. Can’t wait for the .244 and the .307 sizes to come in stock to start enjoying better results with my other calibers.

  2. Caleb Martínez (verified owner)

    (The fix ) for neck run out, went from my worst case .004 to .0005 and my best case .0005 to .0002 or so they just work, at last for me, I no longer spend any dime in any other brand of neck bushings!

  3. Mike (verified owner)

    Just purchased the 263 bushing for my ppc and checked 20 or so cases out of a 100 and none had runout over .001. Most were at or under .0005 which is a significant improvement over my redding titanium nitride which gave me 1-2 thou on average…will it show up on the target at 1-300yds is hard to say, but it is good to know that variable is out of the equation! This bushing sizes a smaller portion of the neck as compared to my redding which is perfect for the 68gr BT that I shoot. I am running a JLC precision die (sorry SAC I didn’t know about yours before and this die matches my reamer perfectly) and it has purposeful space for the bushing to float a bit already. Excellent product and results!

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