Good to hear another 220 success story. I have been reading great things for quite a while about the 220s.
The 220 in 20ga seems to have turned the 20ga shotgun into a most capable rifle with less drop than the 12Ga and plenty of punch as well as reach as one would expect from a .615 bore rifle.
I know several companys make BDC reticle scopes for various calibers and I'm a big fan of the Burris Ballistic Plex on my rifles. I haven't looked into it but is anyone making one compatible with the 20Ga slugs?