Listen to Dennis he seems to know the Whelen.
FWIW I am running a Whelen in an FN commercial action with a 1 in 14 twist 20-inch barrel. I have run up to the old published max load from Alliant of 59.5 Gr Rl15 and a 250 Gr Hornady Rn with a col 3.290 and was getting 2495 fps ten feet from the muzzle. As I do not like to push things at full throttle all the time I too settled in at 58 Grains with absolutely NO pressure signs. Bear
