I'm in the process of building a 280 AI for myself and was wondering if I could get some comments on the following questions: 1. Do you think a 280 AI would make a good rifle for my 12 & 14 year old daughters who hunt deer and elk? 2. Would it be possible to make a 280 AI with only a 22" barrel & if so, how accurate would it shoot? 3. What kind of a barrel twist would I need with only a 22" barrel? Thanks in advance and fire away!