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I don't think removing the expander will help as when I sized the shells there is no resistance at all. The expand doesn't touch the inside of the neck, on other brands of brass you can feel the...

Done so measuring with my "Noah's Ark" calipers which aren't like the new ones of today. As best I could get the OD dia of a sized Graf shell was 6 mm and non sized one was 6.5mm.
The neck thickness...

Not sure of barrel twist probably the same as yours 1-12. It didn't shoot as good with some 60 gr partitions I tried in a long time ago so presume it has the slower twist. It's a standard factory...

I will see what I can find out tomorrow, I will do a bit of checking, thanks for the info.

No they don't stick to a magnet.

I also tried some 55 gr Blitz Kings in my 223 Mod 7 Rem when out with the 250, 25grs of BM2 with that bullet got 3150 fps which surprised me as other projectiles with that charge of powder generally...

Its a strange one alright. A while back I played around with some and tried annealing the neck area to see if that helped. I don't know much about that stuff but out of several cases I got one that...

A while back Beeman's son bought a new carbon fibre stock for his 300 WSM and when he headed of to Aussie to work he gave me the wooden stock. Just the other day I decided to see if it would fit my...