3.035 oal with 140 Bergers. The .264 dia. part of the base is still just above the shoulder.
I started at 56/ H1000 and Fed 215
High 2710
Low 2682
ES 28
average 2694
SD 14

I true up 7saum brass with a sinclair uniformer and lightly turn.
then neck it down to .295 more or less, in two steps. That gives me a neck ID of 262 or so. Some of the brass varies in neck thickness, but most of that is taken care of with that first turn at 7mm.
If you just can't talk yourself out of it PTG has the reamer print.

That reamer was ordered for 140 Bergers. When I tried partitions and Accubonds I was reminded that they have longer bearing surfaces and must be seated deeper to keep them out of the lands.

The Bergers sure slice thru the wind. Noslers give up about 1.5 moa elevation way out there.
email for further details if you need them.