Quote:
not always...............
every rifle and load combination is different.......
|
Of course it varies somewhat, but in general, that is a reasonable range to expect. The problem with the data at your link, is that it only compares a few loads with two barrel lengths, in a couple of rifles, and pressure isn't taken into account. Due to differences in chamber dimensions, the rifle with the 24" barrel may be producing more pressure, with the same load, than the rifle with the 26" barrel. Unless you compare the two barrel lengths at equal pressures, the data is pretty much meaningless.
I have run the same load,same lots of components, over the chronograph, from three different rifles, with the same barrel length, and seen well over 100fps difference, but during load development, I was able to work up the load in all three rifles to a very similar maximum velocity, before any pressure signs appeared. Load results can be misleading, if you don't try to understand them.