OK folks, this may be a big question, hope you all can help. I am having my first custom rifle made. I have chosen the 6.5 caliber, and ordered a Krieger #3 contour 26" 1:8 twist barrel. Now I have to decide on which case. My gunsmith is recommending the 6.5-270. I would like to use this for deer and elk hunting so I am looking at shooting 130gr or heavier bullets. Please give me input on your experiences with the different 6.5 cases, ie... comparing 6.5-06, 6.5-270, (maybe improved versions of these), 6.5 Gibbs, 6.5-280? any other suggestions? I have been going through "cartridges of the world" and the data is confusing if correct, showing less case capacity and lower velocities in the improved versions in some cases. This rifle will have a standard action, and will be used predominately in Washington state and hopefully, Montana. Thanks.