105×617mmR
The 105×617mm, also known as 105×617mmR, is a common, NATO-standard, tank gun cartridge used in 105 mm guns such as those derived from the Royal Ordnance L7.
The 105×617mmR cartridge was originally developed from the calibre Ordnance QF 20-pounder 84 × 618R cartridge as part of the development of the L7 105 mm rifled gun.
Ammunition
Armour-piercing fin-stabilized discarding sabot (APFSDS)
There are different ways to measure penetration value. NATO uses a criterion that 50% of the shell has to go through the plate, while the Soviet/Russian standard is higher as 80% had to go through. According to authorities like Paul Lakowski, the difference in performance can reach as much as 8%| Designation | Origin | Designer & producer | Year | Overall length | Overall weight | Penetrator material / mass | Penetrator L:D ratio | Propellant type & weight | Chamber pressure | Muzzle velocity | Velocity drop | Sub-projectile weight without sabot / with sabot | Perforation at normal and oblique incidences | Notes |
| M735 |  United States105 mm guns using 105x617mm ammunition |