Originally Posted by kospauste
According to the Hydrotec website, the shells are corn based. There's no reason why they shouldn't break down after being exposed to the elements for a long time.
Unfortunately no tested the First Strike rounds to see if they break down in soil as claimed. Some guy left them in the sun and rain for a year with zero effect. These Hydrotec rounds are supposed to break down in the same way. Hopefully someone tests this out.
I actually don't doubt they break down in soil since you can see similar plastic demonstrations on Youtube. Unfortunately there's never a time and/or condition indication. My guess is that it requires hot moist soil and a relatively long (months) time before it even starts to get soft. Dry sandy soil doesn't have much living in it.
What if it takes four years before getting soft in warmer climates and twelve in colder climates? Is that acceptable?