I think there's a little confusion about the 250 Gold Dot. Speer makes only one 250 grain bullet in 45 caliber, and it's the .452 Gold Dot/Uni-Cor Construction designed for the .45 Colt.
They also list the .452 300 grain Gold Dot Casull as Uni-Cor Construction. Their .451 bullets are 185, 200 and 230 grains designed for the 45 Auto - all GD/UC Construction.