I know a few guys with 26" heavy rifled Hastings barrel on their 870s and they shoot great. I know the one guy has taken many deer over a 100 yards shooting Winchester partition gold 2 3/4"
I remember Epps had a huge order coming from Verney Carron but when they arrived they had bluing/rust issues I think and were sent back. Our deer group were waiting for them but when it didnt happen we all bought remington rifled barrels and now have moved on to Savage 220s.