I've test many sabots in my 500. My best results are with the winchester partitiongolds. but I also get great accurecy with BRIs. What I did last year waskeep my old slugs in a plastic bag.You can also buy a coupleboxs of BRIs and partitions after the season on sale and kept them in a plastic bag, even being a year old they shootwell. Use my old slugs whenI firstcheck my sights. Then this yearI bought 2 boxes ofpartitions. Shot3 timeto make sureI was right on the money and got7 leftto hunt with.