Need a little input on steel shot loads for 20ga. Took my boys duck hunting and had issues with needing several shots on some wood ducks. One gun is cylinder bore(I know, it's fixed choke but LOP fits him and I didn't have another barrel this season) so he shot first and the birds were right on us, number 7s first then number 4s. Both Winchester, didn't pattern well. Same load in a modified choke for my other boy. Both break skeet well and I had to bat clean up for both more than I thought I should. Suggested loads to try?