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Discussion Starter · #21 ·
Not sure if I answered before since my old laptop crashed and couldn't find the drawings. 6GT brass is .074" longer than 270AR and .130" longer than 270 MSR. Brass is cheaper than Lapua.
The shoulder location of the GT is only .019" longer than the 270AR, pretty much identical case capacity.
 

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Not sure if I answered before since my old laptop crashed and couldn't find the drawings. 6GT brass is .074" longer than 270AR and .130" longer than 270 MSR. Brass is cheaper than Lapua.
The shoulder location of the GT is only .019" longer than the 270AR, pretty much identical case capacity.
The suitability of 6GT was brought up somewhere in the past. I recently converted 100 pcs 6GT brass to 270AR in about an hour.

And your similar volume note is correct. Don't recall the exact value, but filling with a ball powder seemed to be within a few 1/10's of a grain.
 
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