Last year when I brought my Remington 11-87 slug gun, I wanted to try them, every store in my area never got them, I called Remington they told me they had problems on the production line, by the time I saw them in stores I had my 11-87 sighted in with LIGHTFIELDS and it was shooting great, took a black bear with it here in NJ. People I do know that sighted there guns in with the Ultra-CorLokts, didn't like the performance, seemed the slug would tumble, and the groups weren't good at all.