Hmmmm. I'm surprised the earlier .500s flew good for you. That's rather stiff for a 40# bow. Keeping them full length helps reduce the dynamic spine, of course. Are your new shafts are the same diameter? If they're skinnier, they would likely need to be a little stiffer. I suspect the issue is the additional shaft weight. A heavier shaft will soften the dynamic spine. Thus, strange as it may seem, you may need even stiffer shafts to get good arrow flight with the heavier shafts.
Dan, take a bare shaft and you can tell right away what's happening. too weak or too stiff, nock high or low. One shot will tell all of this.
If you're right handed the arrows are showing very weak, however w the spine you're shooting I'd guess too stiff showing false weak. Easy to verify--- drop point weight and if they get better they are most likely truly a bit weak for that length/tip weight.
Btw, I've used @400gr arrows pulling 34-40# very successfully on our big bodied whitetails. The bows I shoot are not cut to or past center and my 26" draw adds to the equation, but 600, 700, and even 800 spine usually work out for me. I have found a lot of variance in what arrows are marked and what they spine. For example my mfx600s spine .585 and gt Warriors spine .650.
Is you bow center cut? past or before? also draw length and arrow length?
The tear shows under spined, but if the arrow tip is passed center it can give you the same tear. you may need to build shelf out a little shorting the arrow sometimes will align a little better. you can call if you would like,