Need help with reamer.

Caleb85

Well-Known Member
Joined
Oct 30, 2013
Messages
1,053
Location
Northwest, Missouri
I am building a 7mm mag and I am looking for a reamer, I am wanting to chamber it for 168 to 180 gr bergers, a guy told me about the 7mm custom nighthawk and wanted to know if anyone knew anything about it. Here is the print, is this somthing I would be needing?
 

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sable tireur

Well-Known Member
Joined
Oct 8, 2010
Messages
1,611
Caleb85,

Decide if you are using an internal box magazine or a DBM (SAAMI or CIP) and what the useable OAL is for your choice. Then create 3 dummy cartridges loaded to that length with the bullets of your choice and send them to the reamer maker of your choice. No muss, no fuss, no mess. They may have something already in file that will work or they can grind a reamer just to your specs.

The other method used is to have your gunsmith use a SAAMI spec reamer and then use a throating reamer to extend the throat to match your dummy rounds.

Regards.
 

Caleb85

Well-Known Member
Joined
Oct 30, 2013
Messages
1,053
Location
Northwest, Missouri
Caleb85,

Decide if you are using an internal box magazine or a DBM (SAAMI or CIP) and what the useable OAL is for your choice. Then create 3 dummy cartridges loaded to that length with the bullets of your choice and send them to the reamer maker of your choice. No muss, no fuss, no mess. They may have something already in file that will work or they can grind a reamer just to your specs.

The other method used is to have your gunsmith use a SAAMI spec reamer and then use a throating reamer to extend the throat to match your dummy rounds.

Regards.

Thank you ! I was just hoping that this reamer would work so there would be no wait.
 

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