Free: Contests & Raffles.
I never have, and probably never will have a need for anything beyond 400, maybe 450. Even for fun.
You guys that are in the know, why are 22-250's barreled with 1:14 or 1:10 twist, while the lighter/slower .223 has the faster rate? Doesn't make sense to me but I'm not as knowledgeable either.
There are Tikka T3 Superlites out there with a factory 1-8 twist. Check Sportsmans warehouse. I'd go this route if I were you.
When I was active in competitive varmint hunting we started off with a Sako 222 and Remington 22-250 as team guns. Wasn't long before we realized our long range gun was lacking in windy conditions. What we thought was a gun that would give us another 200-300 yard gain really wasn't getting us much more than 100. We made the switch to 6mm and our world changed in a big way! I would not be so quick to discard the .243. Don't think of it as another deer rifle - Think of it as a kick arse big dog rifle that loves dang near every single bullet you put in the tube!
I suspect the trajectory of your 7mm big game loads are about the same as those that I shoot out of my 300 Wby and that matches up very nicely with the trajectory of the 22-250. I have always liked that. FWIW I also shoot 223 in my ARs and in a 788 and like that round just fine too. You won't go wrong with a 22-250 or a 223.If I were making the choice I would go with a quality off the rack 22-250 and not think twice about it.