Without haing a sufficient amount of patina (oxidation), it's just about impossible to accurately date the manufacturing era of a lead bullet.
That being said... I believe the visible evidence strongly indicates your various bullets (and balls) were all manufactured in the mid-20th-century. The key clues are the first bullet and the last bullet shown in your photos.
The first bullet (whose body-diameter measures .311) is a "Spitzer style" bullet. The first US manufacture of Spitzer style bullets was in 1906. However, factory-made Spitzer style bullets (even the 1906 ones) always have a metal jacket. Your photo shows your Spitzer style bullets do not have a metal jacket ...so they are "home-cast" ones, cast by guys who like to re-load used cartridges. If I had to guess about what specific type your first bullet is, I'd say it is a home-cast repro of the US Army .30-06 Springfield bullet Model-1906.
The last bullet is definitely a home-cast 1960s-and-later "Lyman mold" reproduction of a civil war .58-caliber Minie-ball. I still own several exactly like yours, from my bygone days as a Blackpowder shooter. Speaking of which, I was very frustrated to dig a bunch of fired Lyman Mold .58-caliber 3-grooves on a hillside at the Cold Harbor VA civil war battlefield. The giveaway clues about them are their extraordinarily huge base-cavity in combination with "oversize" grooves/rings.
Unfortunately, the presence of the two varieties of home-cast bullets indicates your other ones are also home-cast reproductions of the original 1800s bullets which they resemble.
That sure looks like the one.
