when I tuned my bare shafts a couple weeks ago they were flying good with 210grs up front. I checked agin today and they need 265grs to hit the target strait. Im using a bear hunter TD its 57.5lbs at my draw and Im shooting 30 inch 2216 aluminum shafts with a 8.5 inch brace height. Could this be because my form and release has changed.

That would be the first place I'd look! (form changes)  Your bow or arrows didn't change substantially (brace height would be about all) so  arrows that were flying OK the last time you shot shouldn't need a point weight change today.

Shoot what you have for a while (at least a couple weeks worth of shooting then you will start to recognize whether you need to "re-tune."

Arne

Don't forget about brace height. If you had a new string and it streatched due to break in, you may need to adjust it a bit.