375 Shooters Group Sizes

Lynn Jr

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Minuteman
Nov 20, 2011
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For the shooters using the various 375 cartridges what do your groups look like up close?

I have been and will be doing some more load testing with 350 Sierra's 361 Flatlines and 400 Cutting Edge bullets and want to get a handle on what to expect.
1 inch
3/4 inch
1/2 inch
1/4 inch
What have you been seeing?
 
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Right now the Sierra's are doing 1/2 inch at 100 unsorted. My concern is I am pushing them through a fast twist barrel at 3475 FPS and don't know if they will survive.
 
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One of my team mates rifle.
Vihtavouri powder.
5DDC8C14-0DE5-4D4C-ABB3-D7AE868811A2.jpeg
 
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Right now the Sierra's are doing 1/2 inch at 100 unsorted. My concern is I am pushing them through a fast twist barrel at 3475 FPS and don't know if they will survive.
A friend tried the 350 smk and they would shoot almost one hole at 2950 but anything higher and they opened up. That was 3 nodes from his top speed with them also
 
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