A hunting bullet is designed to expand in a certain velocity range. A 30-30, 308Win and a 300Win Mag can all be bought with 150gr bullets. But the bullets are not the same. The 30-30 bullet will have a thinner jacket. Also a round nose for the magazine.
You can use your pointy bullets. Just single load them. When loading ammo into the magazine, you must make sure the loaded round is not too long, or it won't come out!!!
Maximum length is about 2.55" So you need a vernier, too, so you can measure your loaded rounds.
A ball powder measures very accurately from a powder thrower. For you kind of shooting and loading experience, a ball powder would make life easier. Perfect powders are WW748, H335 and BLC2. Other good powders are 3031, 4895, 4064, varget and RL15.
You need a good loading manual (at least one. Two are better) and you need to read the educational stuff in the book. Several times. It will make the hobby a lot more interesting.
Good books are Speer, Hornady, Lyman and Sierra.