Non, c'est bien celà
7.62x54R au lieu de la munition de 7.62x53R
Parent case 7.62×54mmR
Case type Rimmed, necked
Bullet diameter 7.85 mm (0.309 in)
Neck diameter 8.55 mm (0.337 in)
Shoulder diameter 11.61 mm (0.457 in)
Base diameter 12.42 mm (0.489 in)
Rim diameter 14.40 mm (0.567 in)
Rim thickness 1.60 mm (0.063 in)
Case length 53.50 mm (2.106 in)
Overall length 77.00 mm (3.031 in)
Case capacity 4.16 cm3 (64.2 gr H2O)
Rifling twist 300 mm (1 in 11.81 in)
Primer type Berdan
Maximum pressure 390.00 MPa (56,565 psi)
Plus d'infos ici:
http://forums.gunboards.com/showthread.php?113282-M28-76-Practical-distinction-revealed-between-7-62x53R-and-7-62x54R