gonna get a 25-06 fer my 12 y/o... i am lookin to get a heavy bore...and was wonderin what twist and barrel length is good for 90-130g bullets? she is wanting to get out to 500 yards someday. she is hittin 300 with her 223, bout 4 inch groups. its a rossi, so i wanna get her one where she can get better groups, so she isnt so frustrated not being able to put 3 in a hole. i think she's ready fer a bigger round, so im thinkin just get the 25-06 ..a lil heavier bullet is the reasoning behind it. suggestions? criticism? thanks for takin the time guys.