Here are the rifles in my collection with a known best pellet.
As you can see the .25's are pretty much all Rhino hungry
As more ff my collection are tested I will modify and add to this list,

"Dodo" .25 BSA Challenger. Milbro Rhino's
"Gustav" .25 BSA 635 Magnum Deluxe. Milbro Rhino's
"Nosferatu" BSA Challenger Cobra Strike Hybrid. Milbro Rhino's, Marksman No3
"Pitch Black" .25 BSA Challenger NV. Milbro Rhino's
"Necromonger" .22 BSA Challenger Mercury S Hybrid. Bisley Superfield
"Zebedee" .22 BSA Supersport Custom. RWS Superdomes ,RWS Super-H-Points
"Cromag" .25 BSA Supersport Custom. Bisley Pest Control
"Urko" .22 BSA Lightning Tac. Air Arms Field
"Odd Bod" .22 BSA Mercury S. Bisley Superfield