So there are 600,000 premine coins ? 5.3% premine ?
looks like 300 000 premine to me. How did you see 600 000?
To make things clear and to not have any FUD. Here are the details,
Premine was 300,000 coins, we have roughly 200,000 coins remaining after bounties. We have spent an additional 1.8 BTC in other community bounties.
Proof of stake starts at block 2881. Minimum stake age is 1 hour. No Max age.

I will also update this in the OP. Thanks
Umm... doesn't stake start after block 3000?

but POW ends at block 2880 ??
https://github.com/Boom-Coin/boomcoin/blob/master/src/main.hstatic const int LAST_POW_BLOCK = 2880;
static const int MODIFIER_INTERVAL_SWITCH = 3000;
https://github.com/Boom-Coin/boomcoin/blob/master/src/main.cppif (IsProofOfStake() && nHeight < MODIFIER_INTERVAL_SWITCH)
return DoS(100, error("AcceptBlock() : reject proof-of-stake at height %d", nHeight));
if (IsProofOfWork() && nHeight > LAST_POW_BLOCK)
return DoS(100, error("AcceptBlock() : reject proof-of-work at height %d", nHeight));