GarryB wrote:

AFAIK there is no limit per branch but I dare say having all the nuclear weapons in 8 subs would defeat the purpose of the nuclear triad...

There are limits on launch platforms and individual warheads.

What are you talking about?

Russian Navy will have 8 Boreis and 7 Delta4.

Delta 3 will probably soon be retired but thats still a hell of alot more than 500 warheads

8 Boreis=1000 Warheads

7 Delta 4=448 Warheads

Starting from the fourth hull, all submarines of the Borei class will have 20 missile tubes each, versus 16 for the first three boats. If armed with the Bulava (missile) with ten warheads atop each, a single Borei-class SSBN could then carry 200 warheads - as much as the entire nuclear arsenal of the United Kingdom

Under the terms of the treaty, the number of strategic nuclear missile launchers will be reduced by half. The treaty limits the number of deployed strategic nuclear warheads to 1,550, which is down nearly two-thirds from the original START treaty, as well as 10% lower than the deployed strategic warhead limit of the 2002 Moscow Treaty.[9] The total number of deployed warheads, however, could exceed the 1,550 limit by a few hundred because per bomber only one warhead is counted regardless of how many it actually carries.[9] It will also limit the number of deployed and non-deployed inter-continental ballistic missile (ICBM) launchers, submarine-launched ballistic missile (SLBM) launchers, and heavy bombers equipped for nuclear armaments to 800. The number of deployed ICBMs, SLBMs, and heavy bombers equipped for nuclear armaments is limited to 700.[10] The treaty allows for satellite and remote monitoring, as well as 18 on-site inspections per year to verify limits.[9]

Under the terms of the treaty, the number of strategic nuclear missile launchers will be reduced by half. The treaty limits the number of deployed strategic nuclear warheads to 1,550, which is down nearly two-thirds from the original START treaty, as well as 10% lower than the deployed strategic warhead limit of the 2002 Moscow Treaty.[9] The total number of deployed warheads, however, could exceed the 1,550 limit by a few hundred because per bomber only one warhead is counted regardless of how many it actually carries.[9] It will also limit the number of deployed and non-deployed inter-continental ballistic missile (ICBM) launchers, submarine-launched ballistic missile (SLBM) launchers, and heavy bombers equipped for nuclear armaments to 800. The number of deployed ICBMs, SLBMs, and heavy bombers equipped for nuclear armaments is limited to 700.[10] The treaty allows for satellite and remote monitoring, as well as 18 on-site inspections per year to verify limits.[9]

In 2009 Russia had

Strategic forces (total) 620 Delivery vehicles and 2,787 warheads