Craig - the marker you tried was the GI Micro. The Impulse name is strangely enough the Impulse 50
I'm hoping that at the next Super6 we will have larger range of equipment for people to try. I will ensure an Impulse is there as well as some of our more scenario featured products.
As for upping velocity just to add 2 pennies worth - the joule rating which is one of the reasons for the current safe side of the law limit of 300 fps is what would determine fairness would it not? A level playing field suggests that everything is equal so perhaps the opposite argument could be used, .68 cal has an advantage with slightly increased range due to its size and weight, and therefore to level the playing field you must either turn .50 cal up or .68 cal down so that they both are equal on range and energy. Of course .68 cal would then leave a slightly bigger splat due to volume of fill inside the ball.
Not wanting to get into an argument about 50 vs 68 with this but if insurance companies and legislation are ok with a velocity increase on smaller calibres, based upon proper safety tests etc then who are we to block it. It is proven that .50 cal can reduce expendiature on paint whilst increasing revenue for recreational customer sites.
Of course I do have an interest in .50 Cal (and .68) - so if it was safe and levelled that playing field I would be in favour.