Cheddite Primer pressure spikes

[J.B. Books]

Originally Posted by Andrew Sacco

Well this is fraught with all kinds of scientific holes. Did he measure the powder loads with a scale rather than just trust the bushing? I spent a lot of time measuring powder throws with an RCBS digital scale, and sure enough I varied quite a bit as much as I tried to be consistent. Chamber length compared to the manual? Hull? Temperature? How many times have we run a chronograph on our loads and we "average them" because they vary so damn much. I think we need a heck of a lot more detail before we say Cheddite cause pressure spikes. That's just MY opinion and I'm pretty new at this but I'll say we need more evidence.

What makes the test results of reloads sent for testing by a member of Trapshooters.com more suspect then reloads tested by the members of the PGCA?