FROM WIKI:
"Small arms and maximum point-blank range[edit]
Torso Lethal Shot Placement rectangles of 450 × 225 mm (17.7 × 8.85 in) superimposed over silhouetted soldiers. The point-blank lethal zone of a military target is center mass between the waist and the chest.
Small arms are often sighted-in so that the sight line and bullet path are within a certain acceptable margin out to the longest possible range, called the maximum point-blank range. The range of distance inside the maximum point-blank range is greatly dependent on the external ballistics of the cartridge in question; high velocity rounds have long point-blank ranges, while slow rounds have much shorter point-blank ranges. Other factors in the blank range are the target size (which determines how far above and below the line of sight the trajectory may deviate), the height of the sights, and an acceptable drop before a shot is ineffective.[3]
Maximum point-blank range for hunting[edit]
A large target, like the vitals area of a deer, allows a deviation of a few inches (as much as 10 cm) while still ensuring a quickly disabling hit. Vermin such as prairie dogs require a much smaller deviation, less than an inch (about 2 cm).[4] The height of the sights has two effects on point blank range. If the sights are lower than the allowable deviation, then point blank range starts at the muzzle, and any difference between the sight height and the allowable deviation is lost distance that could have been in point blank range. Higher sights, up to the maximum allowable deviation, push the maximum point blank range further from the gun. Sights that are higher than the maximum allowable deviation push the start of the point blank range farther out from the muzzle; this is common with varmint rifles, where close shots are only sometimes made, as it places the point blank range out to the expected range of the usual targets.
Maximum point-blank range for military use[edit]
This sight setting for maximum point-blank range is also referred to in the military as Battle Zero. Soldiers are instructed to fire at any target within this range by simply placing the sights on the center of mass of the enemy target. Any errors in range estimation are tactically irrelevant, as a well-aimed shot will hit the torso of the enemy soldier. The current trend for elevated sights and higher-velocity cartridges in assault rifles is in part due to a desire to extend the maximum point-blank range, which makes the rifle easier to use.[5][6]"
So, the way I read this, there is really no definition to MPBR...??? Winchester could claim "Flat out to 415" if they admitted they were using a MPBR on Gray Whales for reference.
Just seems like a silly statement for Nosler to hang their hats on in their advertising campaign.....
