Sorry, I should have mentioned this, I was not implying to use Retumbo in your .257 merely stating in my 300 Ultra--I had to switch from RL-22 to Retumbo to get tight groups with the A-frames..

have a Remington Titanium action with Hart Barrel chambered in .257 Weatherby--on of my all time favorite calibers and guns..shooting 100GR Barnes Triple Shocks anywhere from 3650 to 3700 plus--incredible mule deer and antelope round..the last antelope I shot with i, I could see the hair from the off side exit would float through the air from where I made the shot, around 350 yds...Love the smell of gun powder in the morning..

Ripp