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For handloaders chasing that last bit of accuracy, chamber fit matters as much as powder charge and bullet seating. The Redding #7 Competition Shellholder Set gives you a hands-on way to fine-tune case-to-chamber headspace without swapping dies or guessing at adjustments. Instead of one standard shellholder, you get a graduated family of five, each cut to a slightly different height so you can bump your shoulder back exactly where you want it.
The five holders in this set measure +.002", +.004", +.006", +.008", and +.010" taller than a standard shellholder, which puts roughly .125" from the bottom of the case head cut to the top of the holder as the baseline. By raising the case a few thousandths at a time, you reduce how far the die pushes the shoulder back during sizing. Run your resizing die against each holder, measure your fired-to-sized headspace, and you can land on the exact fit your rifle likes. Once you find the right one, your results repeat with no further adjustment needed.
The #7 head size covers a handful of popular cartridges including the 6.5×55 Swedish Mauser, 7.5×55 Swiss, and 45 Winchester Magnum, so it earns its keep across both vintage military and specialty loads. Each holder wears a distinct black oxide finish and is clearly stamped with its thickness, so there is no mixing them up with your standard holders on the bench. No special tools or gauges are required to read them.
Paired with a Redding body die or full-length sizing die, this set turns an ordinary die into a custom-fit tool for your specific chamber. These holders fit most single stage and turret presses, and the whole set tucks into its own storage box to keep things organized between sessions. It is the kind of upgrade precision reloaders reach for when brass life and consistent headspace start to matter.
The #7 head size covers cartridges that share its case head, including the 6.5×55 Swedish Mauser, 7.5×55 Swiss, and 45 Winchester Magnum. If you are unsure whether your cartridge uses the #7 head, check Redding's shellholder-by-cartridge chart against your brass before ordering.
Each holder sits a few thousandths taller than a standard one, which limits how far your sizing die pushes the shoulder back. That lets you match the headspace of your loaded round to your rifle's chamber instead of oversizing, which improves consistency and extends brass life. Once you pick the right holder, every load after that repeats with no die adjustment.
No. Each holder is clearly stamped with its thickness and wears a black oxide finish so you can tell it apart from standard holders at a glance. You just thread your sizing die in, size against different holders, and measure your headspace to find the best fit.
The #7 Competition shellholders are built to the standard shellholder slot and fit most single stage and turret reloading presses. They work especially well alongside a Redding body die or full-length sizing die for dialing in a custom chamber fit.
| UPC | 611760116070 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 11607 |
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