[serpwidgets]

I've got one planet that is at 33% per year. Using the "rule of 72" that means it's nearly doubling every 2 years. At a "meager" 24% (most of my planets are better than that) it will double every 3 years.

With 4000M population producing over 100 colonists per turn, you can easily fill up another breathable planet in only a year or two. For example, say your homeworld is large, and there's another large breathable in the same system. Once you colonize and have a transport, you can quickly split the population in half between the two and with the magic of compound interest end up with 8000M population by about turn 30 (year 3.0)

That seems a bit fast, especially considering I very rarely have any colonies that aren't maxed out on population within a few turns. If dropping the growth rate isn't a fix, then maybe making the colonists a heavier cargo item as was suggested would help.

I was wondering, too, does a racial reproduction bonus of 10% multiply your rate by 1.1 (10% becomes 11%), or does it add a flat 10% to the rate (10% becomes 20%)