Welcome and that's a nice old rifle. My kind of old Remington! I think its a safe bet those cast loads are not a good match for your rifle. When it comes to cast bullets a good match to the bore and the right velocity are very important to good groups. All of my old 8/81's have been at least minute of deer out to 100 yards and a few are better yet. I don't have any in 32 but some of the guys here I am sure will give you some good advice on getting her shooting with the right stuff.