Originally Posted by Runningriot
Do you know what the ID of a barrel has to be for it to take FS without busting them?
I want to say .682-4 or so is about the min but I'm not close to 100%. I think all the dedicated FS guns out there have ginormous barrels from the factory, so maybe someone who's played around with bored barrels or breech-loading will have better insight? You could try pm'ing CCMachinst too, what with him working on the sniper gun he may know.
It may not just be busting the round itself, but compressing the fin section down may reduce performance if it's permanently deformed. The polymer isn't as springy as paintball shell.