I can't deer hunt with a centerfire in Illinois but for my muzzleloader I use the solid copper Barnes Expander MZ in 250 and 300gr. Theyexpand perfectlyand hold together. They are like a $1 a shot just for the bullet + the powder and sabot, some folks say they are too expensive, I disagree. I'll never let a expensive bulletbe a factor in my hunting. Shoot the cheap ones for fun at the range.