RE: Broken or Crushed Pellets
Encore I did the same years ago with Pyro pellets and noticed a slight change in POI, I would assume the same can be said for T7 or 209. Though the POI shift was marginal and it is something that rarely happens so I wouldn't worry to much about it or make it part of your desicion. However since you shoot loose now, I can't see why you wouldn't do the same with T7. It allows you to tweak the load combo, some say it is more potent than the pellet form(so higher velocity with less) and it is CHEAPER. Personally I would suggest sticking with the loose in T7. I used the pellets this year b/c of time, availability, etc but will be going back to loose for next fall with T7 for reasons I stated above.
Good Luck