Start reading about primers here
http://38super.net/index.html Your picture is not great for me, I cant tell squat. Looks like a slight smear but pistol primers are hard to read sometimes
.40 S&W is way to pressure sensitive to work with for me without a chronograph. Without one reading primers is like me trying to read braille...
My best example, 3 different .357's
Same load (10 grains of Blue dot, yes old school shit) 158 LSWC
All three guns slug identical, one is a 3in barrel and the other 2 are 6"
One gun leads bad
One flattens primers
The other shoots 1" @ 25 yards(perfect primers/no leading)
Both 6" guns shoot relatively the same velocity, the 3" gun obviously shoots slower(Not by much)
All three guns show different primer characteristics, none of my chrono data leads me to think that any of these loads are excessive in pressure.
They all display strange differences in primer characteristics but none of them are excessive loads...
I am not saying that your loads are "over" but the simplest thing in my opinion is get a chronograph, if you don't have one available then turn down the load to see what happens to the primers.
Do they look like this?
http://www.ar15.com/forums/t_6_42/364669_.html http://www.ar15.com/archive/topic.html?b=5&f=16&t=122963