I recomend a 223 in a bolt action for out to 300. you can use the old 12 twist to that range with 55gr bullets. my daughter moved up to the 223 in a bolt gun from a 22lr and could shoot 100 rounds at time without getting beat up. When she went deer hunting she used a 243 and was familiar with bolt rifles. I think savage offers model's that wont break the bank. When you shoot more you look to the target lines but they cost more. I used to be a Winchester mod. 70 and Remington M700 fan but I've heard that the quality has droped down on the Remington's, Winchester has gone back into production but I have no experience with the new rifles. Tika/Sako make nice rifles. The old Rem 700 BDL varmiter in 222 Rem will work out to 300 yds. I have a 6BR that I built and it is a neat cartridge. You could have a Rem 700 short action with the .473 bolt face (243, 308, ect.) re-barreled to a 6BR. Good shooting