ORIGINAL: burntmuch
Im shooting the 200 grain SWs & mmp50/40 sabots. I tried the CR 50/40 sabots, they loaded real easy, Couldnt get BH209 to ignite. The guns an Omega X7 with a tight bore. & winchester 209.
Were you compressing your charge? i.e. putting your full weight on your ram rod once you get your bullet seated? Usually smokeless requires that, and BH is more like smokeless than it is like real BP.
Chap