I recently purchased a SBE II with slug barrel and vent rib barrel. The gun shoots wonderfully when using the slug barrel and Winchester sabots but I can't hit the broad side of a barn with the vent rib. I've been shooting a Remington 1100 for nearly 20 years and think I just need to get used to the new fit. The gun patterns well but at the skeet range I'm hitting 50% or less. I’ve tried increasing my lead, decreasing my lead, holding high, holding low, et cetera. I don't claim to be an expert shot but with my 1100 I typically hit 22 or 23 of 25. Any thoughts would sure be welcome. I'm really frustrated!