RE: 250gr TMZs Versus 290 gr TMZs
Your posts from earlier this month indicate you are using loose powder... I think FFF.
Hopefully, you are not planning on 150 gr. 777 FFF.... or are you? It's dangerous & against all recommendations from the gun manufacturer & Hodgdon Inc.
115 gr. 777 is the maximum I've ever shot in my Omega. That was one time only at the range. Lately, I've been using 90 grains 777 FFF-- good to 150 yards. Should my present hunting distances change & allow me 200 yards, I then use 105 gr. 777 FFF.... giving me roughly a 9" drop at 200.