The 41 is enough like the 44 to share many attributes.
I'm sure a Rem 210 HP would be a good slug but if your wanting to practice and shoot more, you can do so with the cheaper lead slugs (Oregon Trails Laser Cast) or copper coated lead bullets. Frankly I like Berry's brand of copper coated bullets for practice and plinking. They work well even without a cannalure(crimp ring) with lighter loads.
Like the 44, powders like H-110 are the best for full throttle hunting loads, but a slightly faster powder like HS-6, will provide you a good practice round without out all the magnum blast.
Be sure to apply a good crimp to each round. Not enough to buckle the case but enough to hold the bullet firm against the recoil. It also helps ignition of the powder to have a good crimp.