It has been used in Southern Oregon, which is to say it has seen every type of weather known to man, often in one day. Rain, snow, 100+F, no matter the conditions, the barrel shoots straight as an arrow.
I mainly shoot Polar Ice in the winter and Evil Premium the rest of the year. Due to the really large bore (my micrometer says it's a .705), the bigger paint obviously shoots better, like Polar ice.
I've used it on an A5 and now have it on my X7, shooting around 285-290 on both guns, using HPA and CO2, and it never performed any different. It was awesome all the time, no matter the setup, the condition, or the air source.
Overall, I'd give this thing a 9/10, taking off a point for its sheer monstrosity. Until you try to maneuver a 20in barel hooked to an X7 through tight chaparrel, you have no clue how big the thing really is. Other than being awkward, there's nothing wrong with it. Oh, and I guess the air efficiency isn't that great, but I don't shoot as many balls due to the accuracy, so it doesn't bother me that much.
This post has been edited by marksman1941: 27 April 2009 - 09:54 PM