Ikedaboy, a 870 with a 26" fully rifled barrel? I haven't seen one of those before. Where did you get that? I have a 21" rifled barrel on my 870 SPS. I did some testing on hardwood logs and was not impressed with the remington copper solids. They group nice at 50 yards and penetrate fairly well compared to other slugs, but sometimes they fail to open. I recovered one of the slugs and the petals collapsed inward, making it a copper monolith. I chose the Winchester Partition Gold slugs instead. They penetrated just as well, but opened nicely into the classic mushroom. Bagged a wild boar with that combo last fall.