I use 48.5 of 2209 with the 140 gn Berger VLD target and hunters, lapua brass and federal match primers. 10 thou off the lands but probably could be a bit closer. Velocity runs at 2850 ish.
I've been up to 51 gns but the primer pockets get a bit lax after a few rounds. Custom 700 with a Hart tube at 27"
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