Well, to be honest I've never tried 180s and used Hornady XTP 300 grain in my muzzleloader with great results. So, I bought some 200 grain XTPs in .44 mag (bought their "Custom Pistol" ammo because I don't reload yet, but may get into that later). Those 200 grain loads are very accurate in my gun, so I decided to stick with them. I'll experiment later after the season closes.