What alignment are you referring to?
I'm referring to the seating die's bullet chamber that aligns the bullet with the case neck as the case is held by the seater die's body. The bigger they are than bullet diameter, the more the bullet can end up crooked or off center relative to the case axis.
I've measured my 30 caliber seater die's bullet chamber diameter:
Wilson BR chamber type .308, circa 1966; .3105"
RCBS standard .308, circa 1966; . . . . . . .3100"
RCBS standard .308, circa 1979; . . . . . . .3115"
RCBS competition .308, circa 1980's; . . . .3107"
RCBS standard .300 Win Mag, circa 1999, .3104"
RCBS standard .30-.338, circa 1967, . . . .3102"
Bonanza BR .30-.338, circa 1980; . . . . . .3093"
Compare those to 30 caliber bullet diameters I've measured that go from .3070" to .3092". Sierra's bullets range from .3082" to .3084" as I've measured. Lapua's D46 match bullet had the largest ones at .3092".
It's my opinion that 98% of all loaded round bullet runout and concentricity problems are caused by the fired case resizing process and die used that ends up with bad case neck issues.