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GWH
The fired neck was about .313 and about .311 with bullet seated. Its hard to get an accurate reading measuring the top of the shoulder as it is hard to see weather its ment to be the shoulder...

I've heard of it increasing velocity, weather its true or not I'm unsure. some guy at a gong shoot was claiming 90 fps increase on his rem mag. i will find out when i get one for my 284.

hi kiwi303.

I have a 284win 20 inch tikka 7mm08 barrel, gun works did the work. only managed about 2670 with 51.5 gr rl17 hitting pressure signs.
that was lapua brass necked up. seems low like...