Hey guys I've got a strange problem and I hope someone can help. My setup is a TC pro hunter fx with a Nikon inline xr scope. I'm shooting 105 gr of blackhorn 209 with a 290 Barnes TEZ bullet. I've got it sighted in dead ass at 100 yds with groupings of about an 1" to 1 1/2" . My problem is when I move to 200yds I'm not even on the paper. Any ideas on what's going on? Could it be the scope and it's focal plane? It's a 3-9 magnification and I've got it on 9 power. Could it be the gun? Maybe the bullet is tumbling or something ? My hunt is coming up here soon, the beginning of October. Any help would be much appreciated! Thanks guys!