Athlon Rangecraft indoor use.

I use the garmin xero, athlon rangecraft, and original labradar in my 7 yard garage. The garmin and athlon are not affected by stuff in the garage. The labradar did not display velocity with error message about failing to calculate ( with range settings a 2,3,4,5,6 yards - trigger mode ). Once I brought the labradar outside to 10 meters in backyard, the unit started to work again. Pellet size -.177 7.5 grain travelling ~500fps. Its amazing what a few years can do in terms of size and speed of calculation.