I got the air Venturi cowboy action metal targets today and was all set to try out my new excite smart shot BBs. The targets say to use lead BBs and these are copper coated lead. So I removed the steel BBs from my red Rider and loaded it up, but then it would not feed them, or if one fired it was extremely under powered, or a bunch of them would just fall out the end of the barrel. They are .177 cal, and the ones that fed but then fell out of the barrel did not look mangled or even scratched. I did not leave the loading gate open. I checked. So I removed the smart shot and reloaded with steel and it works fine again with the steel BBs. What's going on here? Are there other lead BBs that are likely to work better in the Red Rider?