Has anyone had experience with the 400 Brown Whelen?
(30/06 or 35 whelen necked up to 40 cal).
A book I have here reckons someone got over 2100 fps with a 400 grain Woodleigh from a 22" barrel with no pressure problems!
Sounds a bit optomistic to me.
I'm thinking of building one and would settle for 2000 plus if that was obtainable.
I'd also use Woodleigh 400gn in 22" barrel but would prefer a 416" dia rather than 411".