Buchhammers here too. Can be found pretty much anywhere and put a hurtin on deer.
Had to switch because the Hastings slugs I was shooting went out of business. Buckhammers were basically the same slug/wad concept.
Switched, sighted in, same POI.
Now they make Hastings slugs again
Probably going to stay with the hammers around $7 a box.
Use the yellow/green remingtons, for sighting in very reasonably priced.
Then try something else after it is shooting.
You will probably be surprised that the Remington Sluggers (actually a Foster type Slug) might just shoot better than the Buskhammers.
In my 20 ga H&R with 2x scope smoothbore, the Remington Foster slugs shoot almost half as large a group as the Buckhammers or Sabot shells.
Wal-Mart sell the Fosters in 20 gauge for about $3.59 for 5 Fosters. I even got a multipack their about 25 slugs and that made it even cheaper yet for 5 Foster. Make sense to hit the target with something first then you can use the more expensive slugs. I will have to try the Buckhammers but only after I shoot in near bullseye with the cheaper Fosters.