Correct me if I'm wrong,
Sabot color may also designate "Mag" load(ie 150gr).There are 3 tab and 4 tab sabots.4 tab better.Sabots thin and thick depending on "precise" diam of bullet used.The combos available to a shooter who wants to customize his load is endless with various sabots and bullets.

If you recover 3-4 of your sabots,you can tell alot about what is going on with a load/bullet combo.They should open up like a parachute after they leave muzzle.Tabs should look uniform,no signs of powder blow by.If you find them "badly" split,cracked or looks like alot of powder blow by,there's a problem somewhere.
Where the problem might be is another topic all together.

Any way - looks like everbody agrees - Lubin the Sabot is a NO-NO.