7.5×55mm Swiss
Variants overview
Due to the greater pressures produced by the GP 11 rounds, they are not fired in Model 1889 Schmidt–Rubin rifles.

7.5×55mm Swiss

Section Title: Variants overview
Table Section Text: Due to the greater pressures produced by the GP 11 rounds, they are not fired in Model 1889 Schmidt–Rubin rifles.

GP90	GP90/03	GP90/23	GP 11

Cartridge	7.5×53.5mm	7.5×53.5mm	7.5×54.5mm	7.5×55mm

Case length	2.106 in	2.106 in	2.15 in	2.185 in

Rim diameter	0.492 in	0.492 in	0.5 in	0.496 in

Head diameter	0.488 in	0.488 in	0.496 in	0.493 in

Neck diameter (w/ paper patch)	0.362 in (0.362 in)	0.362 in (0.335 in)	0.328 in	0.334 in

Bullet	211 gr	211 gr	190 gr	174 gr

Bullet diameter (w/ paper patch)	0.3208 in (0.3075 in)	0.3208 in (0.3086 in)	0.3075 in	0.306 in

Bullet length	1.14 in	1.14 in	1.165 in	1.378 in

Muzzle velocity	1968 ft/s	1980 ft/s	2050 ft/s	2560 ft/s

Powder measure	27-31 gr smokeless	31 gr smokeless	33.7 gr smokeless	49.35 gr smokeless

Max. service load chamber pressure (Swiss standards)	36,970 psi	36,970 psi	38,390 psi	45,500 psi

Sentence(s)

GP 11 has a load pressure of 45,500 psi.

final_sentence: GP 11 has a load pressure of 45,500 psi.