I did exactly the same. My team mate is using guarder black power up gas and is getting slightly more power than me. Was wondering if anyone was using anything entirely different that was working perfectly for them.
i normally use propane but switched to mapp when it got colder , performance was normal but in cold weather so i guess you could say it was an overall improvement , Mapp will up the fps slightly over greengas/propane so you could say it will/could contribute to more range , probably handy to use if you want to up the fps without having to do any mods, couldnt tell you how much by though , i dont think its much but will increase as the weather heats up .. edit , dont worry about anything breaking , if it does just fix it, its all pretty simple stuff at the end of the day , most things will eventually break at some point...