Hello,
I have a Knight Disc Extreme. I shoot 150gr. of Triple 7 pellets with a 240gr. Sierra .44mag pistol bullet with a Knight sabot. Here is why. 2" high at 50yd. 0" at 100yd. 4" low at 150yd. 6" low at 200yd.
Any muzzleloader with .209 ignition should perform well. Here are some do's and don'ts.....Use the new Triple 7 powder. This stuff performs exactly like the original Pyrodex but doesn't corrode and cleans up with wet patches. I wet the patches in my mouth when in the field. Do not buy the pre-packaged bullets/sabot combos. A box of 100 .44 bullets run around $15.00. A bag of a hundred Knight plastic sabots run under $10.00. This means a 100 rounds is around $25.00. Alot of the pre-packaged combos cost $15.00 or more for 15 rounds or less. Now here's the most important part. Do not,I repeat,do not use any type of bore lube in a modern muzzleloader. This will season the barrel and your accuracy with sabots will be horrible. Use a light swabbing of gun oil for rust prevention but no lube. If you keep your gun clean you won't need it.
If you want to use the Powerbelt brand bullets don't use 150gr. of powder. 150gr. is too much pressure for the P.B.'s small gas seal. The blast will blow up around the bullet and cause it to tumble. 100 gr. works just fine though. I have tried alot of different bullets and the 240gr. Sierra is the best performer. I use the semi-jacketed version, this has given me much better expansion on deer than the popular Hornandy 240gr. Try this combo for Doe's. 150gr. Triple7 and 180gr. bullet. This combo has a muzzle velocity of about 2900fps. They go down hard. Hope this info helps. I have worked this out on my own this info is not heresay.

Happy 2004
L.Bates