Had some keyholing yesterday at the range...worst I and other guys at the range had seen.
Going back today with my original Nosler 50 gr BT loads which always shot well.

Shooting my first Savage build at 100 yds...

Savage 110 single shot long action
24" ER Shaw CM 22-250 Rem 1:14 twist barrel
Federal Case with 33.0 gr H335, Sierra 50 gr Varminter Spitzer, and CCI 200

center, lower left, and lower right targets were first 12 shots then the keyholin started.