Petrol & Powder
Well-Known Member
JWFilips - to get back on track to your question,
Because of the phrasing, I don't believe your question can be answered in its current form.
The question is not whether or not there is a benefit. The question is, "does one need to adjust the loading when using different style primers"?
I'm going to say there's an obvious difference between a SPP and a Magnum SPP (although I once did some testing and the velocities were not significantly affected by magnum primers).
I'm not sure that a SPP listed as non-toxic is any different in terms of pressure when compared to a standard SPP.
Years ago I compared loads with magnum primers against loads with standard primers. All other variables were the same. I was only looking at velocity and couldn't directly read pressure, so I can't speak to a pressure curve.
What I saw was the magnum primers produced velocities slightly higher but functionally similar to the standard primers. The shot to shot deviation in velocity was smaller with the magnum primers. Now, we're not talking about big differences here, so don't get excited.
Because I couldn't read pressures, I'm not going to say you can interchange magnum primers and standard primers. I will say that unless you are operating at the extreme upper limit of acceptable pressure, a magnum primer is probably not going to make a big difference.
So, I wouldn't use the phrase "is there a benefit" but I might ask, "can you use a magnum primer"?
Because of the phrasing, I don't believe your question can be answered in its current form.
The question is not whether or not there is a benefit. The question is, "does one need to adjust the loading when using different style primers"?
I'm going to say there's an obvious difference between a SPP and a Magnum SPP (although I once did some testing and the velocities were not significantly affected by magnum primers).
I'm not sure that a SPP listed as non-toxic is any different in terms of pressure when compared to a standard SPP.
Years ago I compared loads with magnum primers against loads with standard primers. All other variables were the same. I was only looking at velocity and couldn't directly read pressure, so I can't speak to a pressure curve.
What I saw was the magnum primers produced velocities slightly higher but functionally similar to the standard primers. The shot to shot deviation in velocity was smaller with the magnum primers. Now, we're not talking about big differences here, so don't get excited.
Because I couldn't read pressures, I'm not going to say you can interchange magnum primers and standard primers. I will say that unless you are operating at the extreme upper limit of acceptable pressure, a magnum primer is probably not going to make a big difference.
So, I wouldn't use the phrase "is there a benefit" but I might ask, "can you use a magnum primer"?