According to Wikipedia.
The 7.65×53mm Mauser was the result of considerable experimentation by Paul Mauser to optimize the bullet diameter for use with the new smokeless propellant introduced as Poudre B in the 1886 pattern 8mm Lebel that started a military rifle ammunition revolution.[3] At the time of its development it was a high-performance smokeless-powder cartridge.

This cartridge was loaded commercially by many manufacturers in the United States until about 1936.[1] Hornady is the only major U.S. ammunition manufacturer to still produce this cartridge. Sporting ammunition in this caliber is still loaded in Europe.[1] Norma, Prvi Partizan, Sako and Fabricaciones Militares (FM) currently produce 7.65×53mm ammunition.[4] For reloading the cartridge, use .303" British load data.

155 gr (10 g) FMJ-BT 2,710 ft/s (830 m/s) 2,530 ft⋅lbf (3,430 J)
174 gr (11 g) FMJ-BT 2,460 ft/s (750 m/s) 2,340 ft⋅lbf (3,170 J)
180 gr (12 g) SP---- 2,542 ft/s (775 m/s) 2,588 ft⋅lbf (3,509 J)
211 gr (14 g) FMJ--- 2,130 ft/s (650 m/s) 2,150 ft⋅lbf (2,920 J)

A very close friend & mentor of mine Lester H. Hawkes, back in the 70's and 80's now passed, had an Argentine Mauser in 7.5x53, near Houston B.C. Seems to me, the ammo he had was Norma.