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Thick, uneven case necks are a quiet accuracy killer. They can pinch down on the bullet, raise chamber pressure, and throw the occasional flyer that leaves you scratching your head. The Forster NR1410 Inside Neck Reamer is the fix for .410 diameter bullets, shaving excess brass out of the inside of the neck so your wall thickness stays even all the way around. It's ground to .4125", which is the standard .0025" to .003" over bullet diameter that Forster uses across its reamer line.
This reamer mounts in the cutter of a Forster case trimmer in place of the pilot, so if you already run an Original, Classic, or Power trimmer you're ready to go. As you feed the case into the cutter, the reamer rides down the inside of the neck and peels away the excess brass. A staggered tooth design keeps the cut smooth and chatter-free, which means a clean finish instead of a torn-up neck. It's made from high grade, wear-resistant tool steel, so it holds an edge through plenty of brass.
Neck reaming works best after the case has been fired with a full load and before you size the neck or do a full-length resize. A good rule of thumb is to ream after firing or turn after sizing. Not sure if you even need it? Slide a bullet into a fired, unsized neck. If you feel interference or drag, there's extra brass in there worth removing. This is also a go-to tool for wildcatters who are reforming brass from one caliber to another and need to clean up the neck after the conversion.
For anyone loading .41 caliber rounds and chasing tighter groups, this is the kind of case prep step that pays off quietly. Clean up the necks, get your tension consistent, and let the rest of your handloads do the talking.
This reamer is sized for .410 diameter bullets, which covers .41 caliber cases. It's ground to .4125", the standard few thousandths over bullet diameter that Forster uses across its reamer lineup. Double check your bullet diameter before ordering so you land on the right size.
The NR1410 mounts in the cutter of a Forster case trimmer in place of the pilot, and it works with the Original, Classic, and Power models. You'll also need the appropriate cutter shaft if you don't already have one set up. It isn't designed to drop into other brands like a Lyman trimmer without modification.
Neck reaming should be done after the case has been fired with a full load and before you size the neck or run a full-length resize. The simple rule is ream after firing or turn after sizing. To check if you need it, slide a bullet into a fired, unsized neck and feel for interference.
It can. Thick or uneven necks squeeze the bullet unevenly, which can raise pressure and cause flyers. Evening out the inside neck wall gives you more consistent bullet tension and tends to tighten up groups, which is why a lot of precision reloaders keep one on the bench.
| UPC | 757253005039 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | NR1410 |
| Caliber/Gauge | .41 Caliber |
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