I've been reloading .44 Magnum for quite a few years and it has always been harder to size than my other straight walled cases (proportionally). I have Lee and Lyman carbide sizing dies and it just seems to be the nature of the beast. Mebbe my 5, .44s have large cylinders/chambers? Dunno, but my brass has lasts many, many reloadings. My turret press has plenty of leverage, but my C-H "C" style single stage press can get tiresome sizing .44s because of less built-in leverage. Plus what's hard for me, may be a piece of cake for you, hard to tell...
Sometimes I'll use my Lanoline/Alcohol case lube to ease the process.
Sometimes I'll use my Lanoline/Alcohol case lube to ease the process.