"used maybe 10 of them - did not see any difference."

Tried them myself and they did nothing for me. IMO-They are not needed. Good qualitysabots perform really well even with150 grains of Pyrodex granular. The only sabots that i ever hadtrouble withwere someolder green onesseveral years ago when i was using130-150 grains of granularPyrodex. If the load shoots a good group at 100 yards there is nothing wrong with the sabots you are using.

The Savage M/L may be different.