Had been looking for a 6.5X55SE, but found this:
http://www.gunbroker.com/Auction/ViewItem.aspx?Item=240822906The ballistics are very close. The ammo is more expensive. But it looks like there are many different cartridges available; that they mostly run in the 120-140 grain bullet weight does not seem like a drawback, to me. And it doesn't bother me that I might not find ammo at the local hardware store--keeping a ready supply only makes sense.