I've been working up loads for a new 243. It's a 7 twist 24.75" Criterion. The barrel has a straight taper from 1.2 to .760 at the muzzle and weighs 4.5lbs. I've worked up loads with 115 dtacs with H4350, H4831, and H-1000. The nodes seem to be small with this barrel with all powders, .2-.4 at most. I've had barrels with 1-1.5gr nodes where the poi on both elevation and vertical does not shift for several powder charges when doing the OCW load test method. What causes small nodes??