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Thread: 6.5 STW case and load development.

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  1. #1
    sneakywaza I got
    Join Date
    May 2013
    Location
    Fairlie
    Posts
    3,620

    6.5 STW case and load development.

    Started comment on my 6.5 STW development in another thread, but the 6.5 Saum guys felt violated, so starting a different thread for a real 6.5 powerhouse

    Got my hands on a 6.5 STW, Remington 700 action, GRS stock and 3 groove Lilja 28" barrel.
    300 Weatherby cases and a canister of 50BMG to get started, did the math to work out a start load to fireform the cases, necked my first 10 and went down to the range. 80gns of 50BMG got me 3050fps average with 130gn Sierra Gameking HP's.
    Name:  Ready  to fireform.jpg
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    Was only bore sighted so it cost me two rounds to get on the paper to get an idea how it might go for grouping accuracy
    Name:  6.5 STW  fireforming groups..jpg
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    Rather happy with the start, considering I don't normally use bench rests front and rear, normally only ever shoot wrapped through the sling and over a daybag even on the range, so found the shooting off rests really unnatural. Have necked the rest of my cases and loaded then in 5 round sets at +1 grain per set, the last set will run at 88gns of 50BMG, assuming I don't run into pressure problems first, was able to get more in the pre fireformed cases than I thought, will go high 90's in the formed cases. Decent sort of a bang then I think.
    7mmsaum and Bugbait like this.

 

 

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