Both are going to work just fine in the sabots you purchased. The reason one says Mag is they are supposed to be made a little tougher and hold together better when shot into game at higher speeds. Mag or no mag, they both will work fine. I never shot the 230 grain XTP. So let us know how they shoot.

I was shooting the .430 240 grain XTP's in a black .44 caliber Traditions sabot with 70 grains of 3f black powder out of my .50 caliber Lyman flintlock Trade Rifle and my CVA Stalker Carbine today. Both rifles shot them real good with 70 grains of powder.