I have a Bushnell Pinseeker 1500 laser range finder that only reads to about 200 yards? It used to read to at least 500. I've been shooting mostly 22lr, so I haven't noticed it. I've swapped batteries and cleaned optics, but still it reads to about 200 yards and beyond that it doesn't report a distance. I think Ive gone through all the modes and settings (there aren't many) and no increase in range. Any suggestions? They are about 8 years old. Not used that much.