I recommend you get a 1 package of each of these sabots: MMP HPH12, HPH24, 3-petal EZ from here:

http://www.mmpsabots.com/and also 1 package of each of these

Harvester Crushed Rib and their black sabot from here: http://www.harvesterbullets.com/sabots.htm

Many bullets can be shotonce you get the right sabot for your bore! The supplied sabot will NOT fit in every rifle, for example I shoot a Parker Ballistic Extreme, which is .450 and the supplied sabot (MMP24) is very loose in my Savage 10ML, so I switched it out for an MMP12. The SABOT MUST BE TIGHT TO GET ACCURACY. "Tighter the sabot, the tighter the group." Hope that helps.
Chap Gleason

Chap