R.E.A.L Bullet diameters

The base driving band of the R.E.A.L bullets is designed to be small enough to
start into the barrel with just thumb pressure. This is so the center line of the bullet
stays aligned with the center line of the barrel. The top driving band of the R.E.A.L
bullets is large enough to engrave into the rifling, and the tight fit ensures that the
bullet stays seated down against the powder charge.

R.E.A.L bullet driving band dimensions are as follows: 

.45 caliber - top .467 - bottom .452 

.50 caliber - top .517 - bottom .502

.54 caliber - top .557 - bottom .542 

.58 caliber - top .592 - bottom .577