Can someone shed some light on the barrel contour numbers for me please? I have a Lilja #4 at 22" .284. would a #3 be X lighter or too light from them?? Would a bartlein #4 be the same?? Or does each maker have slightly different specs and measurement system. I was interested originally in a proof 22'' sendero light but they didn't produce it for a long long time. I am very happy after a few trips afield but it is a little nose heavy. I have one more custom build for my son so we can have matching .280 AI but he is slighter and a little shorter than I am. What would you go with or to given my parameters? Thanks!