when out this morning an shot my 257 Roberts model 722
using J's ...
same load / powder / primers / cases
bullets were different....120Gr Speer....120 Gr Nosler partition
the Nosler consistently shot 2-1/2" higher then the Speer.
I was surprised at that amount of difference given same them loading.
THE RANGE WAS 100 YDS
THE WINDAGE FOR BOTH WAS EXACTLY THE SAME. THE ELEVATION WAS THE ONLY DIFFERENCE