ths78,
If you read instructions with sabots and/or the gun your using.It should tell you NOT to grease sabots.If your bullet is that tight going down,ck barrel for plastic fouling.Despite what gun and sabot manufacture says I have found plastic fouling that will effect loading.I have this problem with my Knight 45.Clean,soak with good bore solvent.If that doesn't work try another bullet combo.Good Luck