300 Weatherby and Berger 168VLD or 180VLD

[Magnus]

Anyone have any data on this would help. Ive done allot of reloading but not much for a freebore gun. The main thing I need to know is what is the OAL that you guys have had good luck with. Gun is a Mark V Accumark with a 26" barrel and muzzle brake and a Zeiss 4.5x14x50. Thanks for you help

[MT4XFore]

Assuming that you have a Weatherby MK V, it will have a certain amount of freebore. Therefore your OAL is determined by what will fit in the magazine, unless you wish to shoot single shot.
In that case, it depends on the amount of freebore vs. the amount of bullet. You would have to measure that for each and every bullet. I may be wrong, but I dont think you can load long enough in a WBY to reach the lands. You really wouldn't want to anyway because the freebore is there to allow you to shoot that cartridge to its fullest potential.
Hope this helps. Good shooting............
Jim