The Forster Products 0.3405" inside neck reamer is a precision case preparation tool built for handloaders who demand consistent, uniform neck dimensions across their ammunition. Designed to remove excess brass from the inner walls of rifle case necks, this reamer lets you tighten case neck tolerances and improve bullet seating consistency—a crucial step in building match-grade handloads. It's ground to sit 0.0025" to 0.003" over maximum bullet diameter, ensuring you remove only what needs to go.
Forster's inside neck reamer is machined from high-grade, wear-resistant tool steel and features a staggered tooth design that cuts brass cleanly without chatter or gouging. That smooth, controlled cut protects case integrity and extends tool life. The reaming process belongs in your case prep sequence after firing but before neck or full-length sizing—when fired brass is still soft and easiest to work with. If a fired, unsized case neck shows interference when you slide a bullet into it by hand, that's your signal it's time to ream.
This is a specialized tool for serious reloaders who understand the relationship between neck runout, wall thickness, and accuracy. Whether you're loading for a precision rifle, benchrest competition, or just chasing tighter groups, controlling neck concentricity and uniformity with an inside neck reamer is a proven way to improve consistency. Pair it with a tubing micrometer if you want to monitor wall thickness, or use the simple bullet-fit test to dial in when reaming is necessary.
Key Features
- 0.3405" diameter for standard rifle case necks
- Ground to 0.0025" to 0.003" over maximum bullet diameter
- High-grade, wear-resistant tool steel construction
- Staggered tooth design for smooth, chatter-free cutting
- Removes excess brass to improve neck uniformity and bullet seating
Specifications
| Brand | Forster Products |
| Product Type | Inside Neck Reamer |
| Diameter | 0.3405" |
| Material | High-grade tool steel |
| Oversize | 0.0025" to 0.003" over maximum bullet diameter |
| Design | Staggered tooth |
Frequently Asked Questions
When should I use an inside neck reamer in my reloading process?
Neck reaming is performed after cases have been fired with a full load but before neck or full-length sizing. Fired cases are at their softest at this stage, making the reaming process safer and cleaner.
How do I know if my cases need neck reaming?
The simplest test is to slide a bullet into a fired, unsized case neck by hand. If you feel interference or resistance, that indicates excess brass inside the neck and reaming is needed. You can also measure wall thickness with a tubing micrometer for more precise data.
What does the 0.3405" diameter mean?
This reamer is sized for standard rifle case necks measuring approximately 0.340". It's ground 0.0025" to 0.003" larger than the maximum bullet diameter, so it removes only the excess brass while leaving adequate neck wall thickness.
What's the benefit of neck reaming?
Removing excess brass from case necks improves uniformity and concentricity, which leads to more consistent bullet seating and better accuracy—especially important for precision rifle shooting, competition, or hunting where tight groups matter.
