I have never failed to get 1 inch or better accuracy at 100 yards with every T/C Encore rifle barrel I've ever tried except a 375 H&H Mag. barrel that I only got 1.5 inches out of so, for what you want, any T/C barrel would do. The tapered 24 inch barrels make a handy length, the heavy 26 inch barrels are nice and I also like the 28 inch Pro Hunter barrels. By the way, I've NEVER paid close to $300 for a stainless Pro Hunter barrel but I guess I shop well. I would recommend pricing barrels at EABCO and manventureoutpost.com.
I have a Match Grade Machine 375 H&H Magnum handgun barrel and it shoots VERY well. Match Grade Machine barrels cost more than T/C barrels but if you want the best and don't mind paying for the privilege, I would recommend them.