Listen, You asked and I will be honest with my opinion,

That is just an average pattern at that range. You can do way better and most of the error is your combo. I have seen above average patterns and if your going to shoot the Heavy loads, drop the 4-5 and use the #6 that will increase your patterns dencity more.

The choke that you are using is to tight and what is happening to the pattern is you are getting a large amount of fliers as most call it. Your losing a high % of shot because of deformation of that tight choke. Find a .665 -.670 and us it with the Heavy shot like Winchester HD or better yet Hevi 13 in the 2 oz loads #6 and your going to see around 200 shot in a 10 inch at 40 yards.

Hope that helps and I am not bashing you at all here,

AJH