adam,
I see no reason that the Lee 200 gr. bullet would not work well in your .30-30, PROVIDING that the bore riding diameter of the bullet at or slightly over the bore diameter of your rifle. If it is undersized, accuracy will suffer.
I have used heavy cast bullets ... 190 gr (180 RCBS), 205 gr. Old West, and a 220 gr Lyman (311284) in both my .30-30 Winchesters (1-12 twist) and .30-30 Marlins (1-10 twist) with very good results. My favorite load for the 220gr. bullet is 34 grs.of H414 or 4350. With the 190 gr., its 37 grs.of H414 and with the 205, 35.5 grs. of H414 or 4350.
In my rifles, using slow burning powder, these bullets shoot very well. If I do my part, groups run 1 1/2 to 2" @ 100 and that accuracy stays all the way to the 1,000 yard Buffalo with the 220 gr. bullet. Velocity in a 26" barrel with the 220 is almost 2,000 f.p.s., but I have also loaded them down to 1600 f.p.s. with very good results as well.
I have the 314299 bullet which is the same as joeb33050's 311299 only slightly larger. I shoot this bullet in my .30-30 788's and it is a shooter. The nose diameter at .303" is too large to fit in any of my lever guns, but if it would, I have no doubt that it would work well there too.
Good luck,
w30wcf