Re: Sendero 300WBY or Ultra??
300 RUM hands down.
So far the Remmy brass has been great, well except for the very first few lots, there where some dinged ones and messed shoulders, but that is long gone and it was only the first couple months that loaded ammo was on the market.
In the near future we are going to offer a match load geared mostly for the Tactical shooters, but it will work great for anything else if you do not handload.
It will have either a 200 or 220 GR SMK in it.