I used to really dislike my Goblin Deuce due to the shells, they never really seemed to launch a paintball far enough. FS went farther but it was still pretty much useless. I found out that propane was the way to go and I was getting FS to shoot around 240 fps which is pretty usable out of something with such small barrels. I imagine they could go faster/farther is you had it tapped for barrel extensions. If you were to put them in some custom marker with a good bore match for FS and a refined firing pin mechanism (If you've used a Goblin before you'll know that it's a slow process) you may be able to get even better velocities with it.
If you've got shells that work well I say give propane a go.
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Last edited by psychosplinter; 04-05-2013 at 01:24 AM.