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The maximum COL possible with the 402-gr Shock Hammer bullet in the SAAMI .458 Lott:
3.292" COL will be jamming it into the rifling.
Yes, the distance from breech face to start of rifling at 0.458" diameter is 3.0143" for the SAAMI .458 Lott.

For the SAAMI ,458 WinMag the same distance from breech face to start of rifling at .458" diameter is 3.1725",
With the .458 WinMag, that bullet at 3.450" COL is jamming it into the rifling.
Short ogive on the bullet, nose, long shank of .458 major diameter.

Also note that the .458-"400-gr" XTSX will henceforth become a 402-grainer.
That happens when Bubba merely cuts off a 500-gr TSX at the base for 1.400" bullet length.
No hollow point mods to fine tune the weight.
One might say that it is the ".458-402g Hammered By Bubba Bullet" as opposed to the
.458-402g Shock Hammer Bullet by Hammer Bullets.

Barnes makes those TSX bullets by hammer-forging from copper wire,
then cutting the grooves with cutting wheels much like a bank of Dremel Tools.
Tolerances for length and weight on the Hammered By Bubba bullet should be same as those on the Hammered By Barnes TSX.
Not quite as precise as the CNC-turned Shock Hammers.