Wes I agree with your take and have added some additional information.
MM-291 was called a British Sea Service for so long and now they have pretty much been given the name Louisiana Troops Bullet. Several variants are found with deeper, squarer, and crisper grooves with a variety of lengths from .910 to 1.065.
MM-292/293 called Musketoons appear to be the same bullet. There is definitely variants out there with the different profiles to the nose. I also agree the Jenkins Ferry Musketoon is a stand alone bullet with the upper body much longer than the MM-292/293. At one time many thought this bullet was a cut off 69 Caliber 3 Ringer. I believe that has pretty much gone by the wayside with this bullet recognized as a bullet.
MM-295 has always been questionable to me. I believe it is a cut off minie.
MM-296 Uncertain - could this be a fired or blown out MM-297.
MM-297/298/299 have been called Suhls, German Suhls, Dresdens for so long the name has stuck with these bullets probably always referred as the above. New information in RBTRF IV shows the 297 as a 58 Caliber Tennessee Rifle bullet and the MM-298/299 being for the 54 Caliber Mississippi Rifle and found with nose and side cast and possibly from Nashville Arsenal. I have nose cast and side cast in my collection. I was always curious why MM had labeled the MM-297 for Union use with the 298/299 associated with the CS.
MM-301 comes in I don't know how many cavity variants. I have a dish, a cone, a plug, and a dish with a teat. Agree with Wes on the bullet. Great bullet. I love the 301.
MM-302/303 I agree as Kerr bullets but now known as a Tennessee Rifle bullet.
MM-305 Macon works for me Wes, don't understand the conical cavity on this bullet with flat base variants found.
MM-310 may get some attention. I believe this to be a 58 Caliber Burnside as referenced in "SCWB". I have a bullet that is very close to this bullet that measures .577 x .816 x 345 with my bullet having a flat base. The bullet I have is heavily corroded at the base.