Your reloading so your Enfield's won't care what bullet weight you shoot, the standard chamber pressure for the 7.62 NATO is 50,000 CUP (copper units pressure) or 60,000 PSI (transducer method)







Please note bullet weights for NATO ammunition.

Cartridge, Ball, L2A1 (United Kingdomicon): 7.62x51mm ball cartridge, with three subvariants (A2-A4) with unknown differences.
Cartridge, Ball, L42A1 (United Kingdom): 7.62x51mm ball cartridge, 155 grain round
Cartridge, Ball, L44A1 (United Kingdom): 7.62x51mm ball cartridge, 144 grain round
Cartridge, Caliber 7.62mm, NATO, Ball, F4 (Australia): 144-grain 7.62x51mm NATO ball cartridge. Australianicon equivalent to U.S. M80 round.
Cartridge, Caliber 7.62mm, NATO, Ball, M59 (United Statesicon): 150.5-grain 7.62x51mm NATO ball cartridge. A further development of the initial T65 cartridge.
Cartridge, Caliber 7.62mm, NATO, Armor Piercing, M61 (United States): 150.5-grain 7.62x51mm NATO armor piercing round, black cartridge tip.
Cartridge, Caliber 7.62mm, NATO, Tracer, M62 (United States): 142-grain (9.2*g) tracer cartridge, orange cartridge tip.
Cartridge, Caliber 7.62mm, NATO, Grenade, M64 (United States): 7.62x51mm NATO grenade launching blank.
Cartridge, Caliber 7.62mm, NATO, Ball, M80 (United States): 146-grain 7.62x51mm NATO ball cartridge.
Cartridge, Caliber 7.62mm, NATO, Match, M118 (United States): 173-grain 7.62x51mm NATO Full Metal Jacket Boat Tail round specifically designed for Match purposes.
Cartridge, Caliber 7.62mm, NATO, Ball, Special, M118LR (United States): 175-grain 7.62x51mm NATO Hollow Point Boat Tail round specifically designed for long-range sniping. Produced at Lake City Army Ammunition Plant.
Cartridge, Caliber 7.62mm, NATO, Duplex, M198 (United States): 7.62x51mm NATO duplex round with two 84-grain (5.4*g) bullets. The developmental designation was T314E3.
Cartridge, Caliber 7.62mm, NATO, Tracer, M276 (United States): 7.62x51mm NATO so-called "Dim Tracer" with reduced effect primarily for use with night vision devices, green cartridge tip with pink ring.
Cartridge, Caliber 7.62mm, NATO, Match, M852 (United States): 168-grain 7.62x51mm NATO Hollow-Point Boat-Tail cartridge, specifically designed for use in National Match competitions, later approved by US Army JAG for combat use by snipers.
Cartridge, Caliber 7.62mm, NATO, Saboted Light Armor Penetrator (SLAP), M948 (United States): 7.62x51mm NATO Saboted Light Armor Penetrator cartridge.
Cartridge, Caliber 7.62mm, NATO, Armor Piercing, M993 (United States): 126.6-grain 7.62x51mm NATO armor piercing round, black cartridge tip.