switching releases- changes?

[NVpackrat]

I my familiar release hunting- it was a Bear release (15 years old!), and I'm going to try a Tru Ball short & sweet for the remainder of the season. Is there any major change to expect for in my shots with this switch? I know there will be a slightly different angle, and it has me worried this late in the game (1 week left). I am also hoping someone knows where to get the old style t-handle thumb releases, just in case. There are several of the new style ones, but I am trying to see if it is easier to switch styles altogether, since the old one seems to be no longer made. Thank you for your time.
NVpackrat

 

[WapitiBob]

could be a big difference in point of impact. take a cpl shots from 20 and from 40 to see where you are.

 

[NVpackrat]

I've taken a couple groups at 20, 30 & 40- so far, the group is only larger by a total of 1" . The groups are still in the vitals, just that I am tending not to pull back as far as I used to (new release is longer). I was just a little worried when it comes to the 'big one' and I'm not all coherent, what kind of errors I'll be making. Thank you.