Description
Anyone who has chased consistent shoulder bump knows the frustration of cranking a sizing die up and down trying to hit a target measurement. The Redding #1 Competition Shellholder Set takes that guesswork off the bench. Instead of adjusting the die, you set it once against the shellholder and then swap holders to fine-tune how far the case shoulder gets pushed back. Each of the five holders is machined slightly taller than a standard shellholder, so stepping up a holder moves the shoulder bump in a known, repeatable direction.
How the Redding #1 Competition Shellholder Set Works
The set includes five shellholders in .002 inch increments at +.002, +.004, +.006, +.008 and +.010 inches. Set your die to make hard contact with the base shellholder, size a case, measure the headspace, then move up a holder until the shoulder bump matches your chamber. Once you find the one that gives you the fit you want, your results repeat every time with no further die adjustment. It is a mechanical approach that removes the trial and error, and it makes every full-length die behave like a custom-fit die for your rifle.
What Fits the #1 Shellholder
The #1 holder covers a huge chunk of the most popular rifle cartridges. Think .308 Winchester, .30-06 Springfield, .243 Winchester, 6.5 Creedmoor, .270 Winchester, 7mm-08 Remington, .280 Remington and plenty of others in that case head family. If your reloading dies call for a #1 shellholder, this set drops right in. The holders work with standard single stage and turret presses.
Finish and Markings on the Redding #1 Set
Each shellholder wears a black oxide finish for corrosion resistance and easy identification, and every one is clearly stamped with its increment so there is no squinting or second-guessing which holder is in your hand. The whole set lives in a six-slot storage box, leaving one open position for your standard #1 holder so everything stays together in one place on the bench. For handloaders working up precision ammo or just trying to get brass life and consistency dialed in, it is a straightforward tool that earns its keep.
Key Specifications
- Manufacturer: Redding
- Manufacturer Part Number: 11601
- UPC: 611760116018
- Shellholder Size: #1
- Pieces in Set: 5
- Increments: +.002", +.004", +.006", +.008", +.010"
- Finish: Black Oxide
- Fits Cartridges: #1 holder: .308 Win, .30-06 Sprg, .243 Win, 6.5 Creedmoor, .270 Win and more
- Press Compatibility: Single stage and turret presses
- Storage: 6-position storage box included
- Shipping Weight: 0.2 lbs
What’s Included
- Five #1 competition shellholders (+.002", +.004", +.006", +.008", +.010")
- 6-position storage box with one open slot for a standard shellholder
Frequently Asked Questions
How does the Redding #1 Competition Shellholder Set adjust headspace?
You set your sizing die to make contact with the base shellholder, size a case, and check the headspace. Then you simply swap to a taller holder in .002 inch steps until the shoulder bump matches your chamber. Once you land on the right one, the setting repeats every time with no further die adjustment.
What cartridges does the #1 Competition Shellholder Set fit?
The #1 holder covers a large group of common cartridges including .308 Winchester, .30-06 Springfield, .243 Winchester, 6.5 Creedmoor, .270 Winchester, 7mm-08 Remington and .280 Remington, among others. If your reloading dies specify a #1 shellholder, this set is the right match. Always confirm against your die's shellholder callout.
How many shellholders come in this set and what are the increments?
The set includes five shellholders, each machined slightly taller than a standard holder. The increments run +.002, +.004, +.006, +.008 and +.010 inches, giving you fine control over shoulder bump in .002 inch steps.
Will the Redding Competition Shellholder Set work in any press?
Yes, these holders fit standard single stage and turret reloading presses that accept common shellholders. They slide into the ram just like a regular shellholder, so no special tools or gauges are needed to use them.



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