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There are no loads available yet for the
.50 McMillan Bros. (Fat Mac)

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NOTE: The below shoulder angle is an estimate based on the provided shoulder geometry.
Standard American S.A.E. (in.)
Metric Metric (mm.)


SPECIFICATIONS
Bullet Diameter:
.511 in.
Max Overall Length:
4.185 in.
Case Capacity (est):
406.9 gr. water
Primer Size:
.315 in.
 
NOMINAL PERFORMANCE
Bullet Weight:
750 gr
Muzzle Velocity:
3,400 fps
Muzzle Energy:
19,261 ft-lbs
.50 McMillan Bros. (Fat Mac) at AmmoGuide.com 
.50 McMillan Bros. (Fat Mac) at AmmoGuide.com
"Easy Link" to this cartridge (copy and paste into emails, forums, etc.):
.50 McMillan Bros. (Fat Mac) - http://ammoguide.com/?catid=445

Also called the 12.7x67mm, this cartridge is based on the 20mm artilley/cannon round. Developed by the late Gale McMillan and his son Rock, the round was introduced by McMillan Bros in 1996.
http://www.mcbrosrifles.com/

The "Fat Mac" was targeted for long-range Fifty Caliber Shooters' Ass'n. (FCSA) competitions.
http://fcsa.org/

A special primer insert is required to adapt .50 BMG primers to the 20mm case.

To compare .50 Fat Mac ballistics with the .50 BMG and .510 DTC EUROP:
http://ammoguide.com/cgi-bin/bcompar...445%7c

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