---
title: "This Clever Tool Makes Modifying Your Own Cases Much Easier"
description: "This kit makes setting up your own cases to use with Hornady's OAL gauge a breeze, using your own fired brass."
date: "2025-09-08"
modified: "2025-09-08"
authors:
  - name: "Tyler Freel"
    job_title: "Staff Writer"
    link: "https://www.outdoorlife.com/authors/tyler-freel/"
url: "https://www.outdoorlife.com/guns/ryt-gear-modified-case-jig-kit/"
categories:
  - "Ammo"
  - "Guns"
tags:
  - "Gear Reviews"
---

# This Clever Tool Makes Modifying Your Own Cases Much Easier

![RYT gear oal gauge modified case kit](<https://www.outdoorlife.com/wp-content/uploads/2025/09/IMG_9180.jpg>)
*This jig kit from RYT Gear makes modifying cases easy. Tyler Freel*

Hornady’s OAL gauge is a useful tool for determining maximum overall length for your handloaded ammunition. It utilizes a modified case (that you can buy) that’s drilled and tapped to thread onto the end of the gauge. This piece of brass doesn’t have the neck tension to hold a bullet securely, so when installed on the gauge you can drop a bullet into the neck, push this modified cartridge into the chamber, then slide the plunger forward until the bullet comes into contact with the rifling in the throat. After locking down the plunger, remove everything, drop the bullet back into the case, and you have a solid measurement for the cartridge's overall length at which the lands are contacted.

One criticism of this system is that you have to buy or order the modified cases — which is even less convenient for wildcatters. But this new [kit from RYT Gear](<https://rytgear.com/products/modified-case-jig-kit>) gives you everything you need to make your own modified cases using your own fired brass. I’ve been using this for cartridges like 22 ARC, 25 PRC, .30/06, and .300 PRC.

https://youtube.com/shorts/8uaTkEmhFuE?si=s_zxABp-rmj4GTbH

## Steps for Making Your Own Modified Cases:

1. Decap fired case
2. Remove de-capping rod and/or neck mandrel rod from sizing die
3. Insert fired case into sizing die until it sticks
4. Thread jig body over sizing die with case into it until hand tight
5. Install drill bit guide to jig body
6. Drill out primer pocket
7. Thread tapping guide into jig body
8. Tap
9. Remove sizing die and case from assembly
10. Use reloading press to pull case from sizing die if sticky

This is another great piece of reloading equipment, like the stuck case remover, that may not see daily use, but when you need it, you’ll never regret having it.

## Author
Tyler Freel is a Staff Writer for *Outdoor Life.* He lives in Fairbanks, Alaska and has been covering a variety of topics for OL since 2010. From backpack sheep hunting adventure stories to DIY tips to gear and gun reviews, he covers it all with a perspective that’s based in experience. Freel is never one to shy away from controversial topics. He’s responsive to readers on OL’s social channels and happy to answer questions, debate opinions, and squash trolls.

### Author social links  
[Instagram](<https://www.instagram.com/thetylerfreel/>)  
[LinkedIn](<https://www.linkedin.com/in/tyler-freel-5b1555134>)