Do I really need to pattern new shells with straight 9s when 7s do this?

[RAU]

Hi guys, title says it all.  I picked up a new box of 3 1/2" Federal TSS straight 9s.  I don't want to waste a $16 shell if I don't have to when my 835 and Carlson choke does this with same shell loaded with straight 7s at 43 long paces. What do y'all think?

[Spring Creek Calls]

There's only one way to know for sure.

[Penguin907]

Probably not it's TSS. Hard to miss with shot that small.

[Bowguy]

Easy answer is yes.
I pattern straight 7.5s and 9s. They fly straight but the 7.5 is a little lower. This was off a rest.