The two most recent for me were
6.5 x 284, 120 gr bullet with 16 gr through 20 gr of Bluedot. All were 1-1/4 or less groups at 100yds.

7.62x39, 150 gr Hornday .312 bullet and 6.9 gr of Titegroup, subsonic. Load data from Hodgdon and works well from the bolt gun.

I'm hunting close range woods distance and don't need max velocity and don't want to sell my rifles for something smaller.

The 223, 22-250, 6mmBR, 243, 6mmCreedmoor and 7x57 have also worked well with reduced loads.

Nudge Seafire for more load ideas!

"Camping places fix themselves in your mind as if you had spent long periods of your life in them.
You will remember a curve of your wagon track in the grass of the plain like the features of a friend."
Isak Dinesen