Probably mentioned already but just in case, it is a three shot load with the front in #6 flitestopper lead,
next #5 nickel plated lead I recall, and last is #7 shot in the Federal HW , all in a flite control wad.
No idea of oz of shot, etc. so look out for this alternative to the Win XR concoction.
Very interesting that the NWTF winners in two divisions used the Win LB XR in #6 shot . This has been won using Hevi-shot for years.