Description
If you load for a .35 caliber rifle and you've noticed your fired brass feels a little tight when you slide a bullet into the neck, this is the tool that fixes it. The Forster 0.3605" Inside Neck Reamer is sized for .358 diameter bullets and shaves away the excess brass that builds up on the inside of the neck walls after firing. Thick necks can bump up chamber pressure and throw flyers downrange, so getting that material cleaned out keeps your loads safe and your groups tighter.
How the 0.3605" Neck Reamer Does Its Job
This reamer mounts right in the cutter of a Forster Original, Classic, or Power Case Trimmer, taking the place of the pilot. The cutting edge is ground about .0025" to .003" over maximum bullet diameter, which is why a .358 bullet gets a 0.3605" reamer. The staggered tooth layout is the detail that sets it apart. It cuts brass cleanly and keeps chatter out of the equation, so you get a smooth, uniform neck instead of a rough one.
The cutter itself is machined from high grade, wear-resistant tool steel. That means it holds an edge through plenty of cases and will be riding on your bench for years rather than wearing out after a season of loading.
When to Reach for the .358 Inside Neck Reamer
Timing matters with neck reaming. Forster's own guidance is to ream after the case has been fired with a full load and before you neck size or full-length size. A good way to check if a case even needs it is to drop a bullet into a fired, unsized neck. If you feel the bullet drag or bind, that neck has excess brass and is a candidate for reaming. The rule of thumb that gets passed around the reloading bench is simple: ream after firing, turn after sizing.
This is a single-caliber tool built for .358 bullets, so it's a natural fit if you're loading the .358 Winchester, .35 Whelen, .35 Remington, or similar .35 caliber rounds. Pair it with the trimmer you already own and it slides right into your existing prep routine.
Key Specifications
- Manufacturer: Forster Products
- Manufacturer Part Number: NR1358
- UPC: 757253005008
- Caliber/Gauge: .35 Caliber (.358 bullet diameter)
- Reamer Diameter: 0.3605"
- Grind Tolerance: .0025" to .003" over max bullet diameter
- Material: High grade wear-resistant tool steel
- Tooth Design: Staggered tooth for chatter-free cutting
- Compatibility: Forster Original, Classic, and Power Case Trimmers
- Color: Silver
- Country of Origin: USA
- Quantity: 1
What’s Included
- One Forster 0.3605" inside neck reamer (.358 diameter)
Frequently Asked Questions
What cartridges does the 0.3605" inside neck reamer work with?
This reamer is sized for .358 diameter bullets, which makes it a fit for popular .35 caliber rounds like the .358 Winchester, .35 Whelen, and .35 Remington. Any cartridge using a .358 bullet is a candidate as long as the neck shows excess brass. It handles the inside neck wall, not the shoulder or body of the case.
Does this neck reamer fit my case trimmer?
It mounts in the cutter of a Forster Original, Classic, or Power Case Trimmer, slipping in where the pilot normally goes. You'll need one of those trimmers to use it, since it isn't a standalone handheld tool. Once it's in, you turn the cutter assembly through the neck and back out to make the cut.
When should I ream the case necks?
Forster recommends reaming after the case has been fired with a full load and before you neck size or full-length size. A simple check is to drop a bullet into a fired, unsized neck. If you feel the bullet drag, the neck has excess brass and should be reamed or outside turned.
Why is the reamer 0.3605" when the bullet is .358"?
Standard Forster neck reamers are ground .0025" to .003" larger than maximum bullet diameter on purpose. That slight oversize leaves the proper amount of clearance for consistent neck tension and smooth bullet seating. So the .358 bullet pairs with a 0.3605" reamer by design.




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