Hi Kevin,
I ran it through GRT and got a somewhat different answer to Frog Stealer. I note that he's used a 26" barrel. The key parameter in these simulations is having a precise case capacity -> GRT default is 94.4gr H2O.
To be on the safe side, I would advise measuring the H2O capacity of a fired case (with the fired primer still in) - once we have this value, a more robust starting load can be given.
GRT suggests 80.8gr V565 for 2400f/s at the muzzle for 24" barrel and 94.4gr H2O case capacity, giving a peak pressure of 37,800psi (CIP max allowed pressure is 47,000 psi - so you're well away from the red zone provided the case capacity is more or less in line with my assumption). I assumed the exact same bullet as FS.
I don't think the suggestions are world's apart but it does show that accurate input data is quite important
As an aside, N565 is not an optimal powder for this round as the burn rate is a bit slow - only around 84% is calculated to be burnt by the time the bullet exits the muzzle. This means 2 things - 1. that there will be impressive muzzle flash and 2. the inconsistency of the powder burn may mean a significant deviation between the simulation and reality. I appreciate that you may not have much of a powder selection in Zim, so you have to do what you must.
If you can give us the actual case capacity and the chrono'd MV from a starting load, then the software will help you get much closer.
