Here's my numbers from around 1988, using the GOEX available then. All loads, 2F. .58 hawken 34" bl.
.575gr. round ball 285gr.
:95gr. --spit patch - 1,424fps spread 48fps.
:140gr. -spit patch - 1,683fps 10fps spread -- Bear Grease patch - 1,736fps 36fps spread
:160gr. -spit patch - 1,810fps 8fps spread-----Bear Grease patch - 1,857fps 74fps spread
:185gr. -spit patch - not chronographed------- Bear Grease patch - 1,951fps 42fps spread
:200gr. -spit patch - 1850fps spread not listed note similarity to 160gr. spit and G Brease patch.
I should note here, all shooting was done without wiping. Spit patch always gave better accuracy than any grease or oil. The barrel started shooting well at 140gr. 2F. 95gr. would barely stay on a pie plate at 100yards. With 140gr. I could stay on that pale at 200 yards easily and at 100yrds, shoot into 2" or better.
Slug: 675gr. RNHB - modified Lyman # 57730 mould.
:150gr. 2F - 1,250fps
:160gr. 2F - 1,325fps
Yeah - they kicked with the hawken butt plate. I was young, dumb, ect, etc.