WHOA 1/2" thats GREAT.............65Bucks a box, guess I'll have to load some!!!!! Have you tried the Winchester 140 factory stuff? They shot 3/4" outta mine, didn't chrono them though......Finally fired and used the Chrony on the Nosler 130 grain Accubond they shot 1/2 groups and velocity 3,075fps. The box listed its velocity at 3,100fps so pretty close. The only thing is I paid $65 a box so that sucked.
Hodgdon's data shows 70.5 grains of Retumbo pushing a 120 out at 3299 fps with 61,700 PSI. If you're getting over 3600 fps with one, I think that's a bit past the safety margin. Unless you've got a 34 inch barrel.I was getting over 3600 fps with the 120 BT in my 264 Win mag with Retumbo.
Hodgdon's data shows 70.5 grains of Retumbo pushing a 120 out at 3299 fps with 61,700 PSI. If you're getting over 3600 fps with one, I think that's a bit past the safety margin. Unless you've got a 34 inch barrel.
Nice my rifle has a tight chamber too. I like Retumbo but so far US869 seems to be the powder that works for me. I'm using winchester brass CCI primers and COAL 3.350
I'm using CCI 250 Large Primers magnum for all my loads. Is there a difference from CCI, Winchester, federal or Remington primers?