Re: Bergers in 300 wby?
I've shot the 210 VLD"s @ 3,150 ft/sec in my RUM with .5-.6moa accuracy at 200 yds. I have also shot the 162gr (7mm) VLD's a bit faster with excellent accuracy. I don't believe that high velocity with the Bergers will be a problem in your 300 WBY.
For whatever it's worth, cartridges that are too long for the magazine box will often allow you to put one in the top of the magazine because the point of the bullet sits well above the box. Then you can carefully load one in the chamber and close the bolt while slightly depressing the single round in the magazine. This way you will at least have a second shot if needed.