250 gr or 300gr? Most people prefer a heavier bullet if your MZ shoots then accurately. My Triumph liked the 250 grain better. The 250gr is usually the starting point with most modern muzzleloaders and will be more then appropriate for deer hunting.
Also, I have found better grouping with the black supplied sabot, not the superglide. Superglides were just not as accurate and some others here have had the same experience. Many here will have great advice on after market sabots, but the black supplied ones shot great for me. Good luck.