Honing the Neck in Sizing Die

[Halffull]

1/4”, reduce the size of it a little then lap. Just as recommended above.

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.

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Edit: The 6mm mentioned above is .23622” so it would have plenty of room to expand to your dimensions.

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.

www.mcmaster.com

Here’s a website describing the process as mentioned above.

Lapping Reloading Dies

In this project I will take you through the steps and method of altering the neck dimension on a standard reloading die. The purpose of this is to maintain neck alignment to the case body for the b…

rickaverill.com

Thanks for the response. I placed my order yesterday and opted for the 7/32 as I was leery of modifying a lap. I wish I had added the larger size to the order now. The 6mm would be ideal.

 

[whatsupdoc]

Thanks for the response. I placed my order yesterday and opted for the 7/16 as I was leery of modifying a lap. I wish I had added the larger size to the order now. The 6mm would be ideal.

The 7/16 is too small

 

[WSnyder]

In theory the 7/32 will expand to 0.2516”. Will it actually? I can’t say because I haven’t tried it. Let us know once you get it.

 

[Halffull]

In theory the 7/32 will expand to 0.2516”. Will it actually? I can’t say because I haven’t tried it. Let us know once you get it.

The 7/32 did work, in fact it worked too well. In spite of measuring often with the .246 gauge, I over did it by .001. My target of .246 ended up at .247. With spring back it makes the Starline brass with a .013 neck thickness at .248 without expanding. Still very usable for this application.

The 7/32 was bulged a lot with the very center of the bulge doing the work. I would buy the 6mm next time as it would have a longer working surface.