Unusual or uncommon loads - post yours!

I've been reloading for a decade or so, and in that time I've played around here and there and come up with loads that I'd consider uncommon as in "it's not often you'd come across that". I'm hoping this thread basically compiles into a long running collection of uncommon vetted loads (i.e. you have loaded and shot them safely) that can act as reference material for us all. Most of these are "low recoil" or subsonic loads, with some exceptions.

I'll start:

300 Win Mag - 180gr Speer HPBT, Win case, LR primer, 33gr IMR 4198 (should be around 2000 fps). Rem 700. 3.340 coal.

458 Lott - 350gr Hornady FP, Hornady case, LRM primer, 60gr IMR4198. Ruger M77. 3.600 coal

45-70 Govt - 500gr Hornady DGX, Hornady case, LRM primer, 46gr IMR 4198. Ruger #3. HOT - THIS IS ONLY SAFE IN A RUGER ACTION. Edit, found coal. 2.875"

45-70 Govt - 500gr Woodleigh SP, Hornady case, LRM primer, 46gr IMR 4198. Ruger #3. HOT - THIS IS ONLY SAFE IN A RUGER ACTION. Edit, found coal. 2.875"

458 SOCOM - 500gr Woodleigh SP, Starline case, LP primer, 19.7gr H110gr. AR-15 w/Tromix 10.5" barrel. Cycles with and without silencer. Subsonic load. Coal 2.230

Trailboss (low pressure/velocity/recoil) loads:

308 Win - 220gr Sierra RN, Federal case, LR primer, 13gr Trailboss. Subsonic and stable through my cans. M1A, Rem 700. Coal 2.800. I've also done the same with 178 HPBT and ~10gr. None will cycle M1A.

6.5 Creedmoor - 140gr Nosler HPBT, Hornady case, LR primer, 10gr Trailboss, Rem 700, coal 2.800. Subsonic and stable through my cans.

375 H&H - 270gr Speer HPBT, Hornady case, LRM primer, 22gr Trailboss. Ruger #1. Coal 3.600

416 Rigby - 350gr Speer, Norma case, LRM primer, 35gr Trailboss. Ruger M77. 3.600

416 Rigby - 400gr Hornady, Norma case, LRM primer, 30gr Trailboss. Ruger M77. 3.600

458 Lott - 350gr Hornady FP, Hornady case, LRM primer, 25gr Trailboss. Ruger M77. Seat to cannulure.

45-70 Govt - 405gr HSM lead, Hornady case, LRM primer, 13.5gr Trailboss. Ruger #3. Crimp groove.

458 SOCOM - 405gr HSM lead, Starline case, LP primer, 10.0gr Trailboss. AR-15 w/Tromix 10.5" barrel. Does not cycle in AR, but shoots fine. Crimp groove.