I have an opportunity to check some primers mfg and magnum vs regular against each other. With the LabRadar I can get accurate velocity and I have loads in 7.5 Swiss and the 6.5 Lapua that are consistently accurate.
The results may not be as accurage as the baseline, who knows what pressure profile comes out of any given primer ignition patch, but it will inform somewhat as to what impact it has on velocity.
In the 6.5 I have CCI regular, CCI magnum and Winchester regular. That load is up around 2650 fps.
In the 7.5 Swiss I have CCI regular, Remington regular and CCI magnum. That load is quite low in the 2300 FPS range but works very nicely.
Baseline will be the regular primers and I have or will have 10 each of the other primer types.
That may help others when they ask the question about changing component from what the book says was tested.
In reality, as long as you start under medium loads, none of those being changed is going to jump you into a too hot load (there are some powders listed sometimes with vary narrow load range and those I would simply stay away from)
The results may not be as accurage as the baseline, who knows what pressure profile comes out of any given primer ignition patch, but it will inform somewhat as to what impact it has on velocity.
In the 6.5 I have CCI regular, CCI magnum and Winchester regular. That load is up around 2650 fps.
In the 7.5 Swiss I have CCI regular, Remington regular and CCI magnum. That load is quite low in the 2300 FPS range but works very nicely.
Baseline will be the regular primers and I have or will have 10 each of the other primer types.
That may help others when they ask the question about changing component from what the book says was tested.
In reality, as long as you start under medium loads, none of those being changed is going to jump you into a too hot load (there are some powders listed sometimes with vary narrow load range and those I would simply stay away from)