One of my buddies are I have been shooting them quite a bit. We have developed loads in 260REM, 264WM, 6.5WSM, 30-06, 300WSM, 300RUM, 280AI and 28 Nosler. We have achieved half MOA loads in every gun we've put them through. We've had to experiment some with different powders and seating depths. But overall they are very easy to tune and produce excellent precision. We will be putting them into deer and elk flesh this fall.