realistic ballistics comparisons
11-15-2002, 09:46 AM
#11
Join Date: Feb 2003
Location: Carthage MO USA
Posts: 35
RE: realistic ballistics comparisons
stubblejumper, basically I agree with what you a saying here, (please correct me if I'm wrong.) If you a going to compare cartridges don't stack the deck in favor or against a cartridge. Use the same basic loads and same barrel lenghts. I'm I correct?
Now for the part I disagree with on. You write "In all cases when loaded to equal pressres and fired out of equla barrel the 270 and 30-06 can't match the 7mm rem mag or 300 win mag and the differences are significant requardless of what some individuals may tell you."
If you could or did load a 30-06 to the equal pressure of 300 win mag with all other things be equal you would find that the velocities would be the same. For example: If a 30-06 with a 26" barrel is loaded with a 165gr bullet and 61grs of Reloader 19 the velocity will be approximately 2800fps with a pressure around 46500psi. Now let's compare this to the 7mm rem mag with a 26" barrel loaded with a 162gr bullet with 61grs of Reloader 19 the velocity will be approximately 2800fps with a pressure around 43500psi. (Both loads can be found in Hodgdon's 26th edition.)What's the difference? Both cartridges are pushing a 160+ grain bullet at about 2800fps at close to the same pressue levels. My chronograph tells me that the velocities for both loads are close.
I don't know anything about the wsm's, but physics tells me that if they can develope the same pressure as the standard length or magnum length cartridges then there should be very little difference velocities.
Now for the part I disagree with on. You write "In all cases when loaded to equal pressres and fired out of equla barrel the 270 and 30-06 can't match the 7mm rem mag or 300 win mag and the differences are significant requardless of what some individuals may tell you."
If you could or did load a 30-06 to the equal pressure of 300 win mag with all other things be equal you would find that the velocities would be the same. For example: If a 30-06 with a 26" barrel is loaded with a 165gr bullet and 61grs of Reloader 19 the velocity will be approximately 2800fps with a pressure around 46500psi. Now let's compare this to the 7mm rem mag with a 26" barrel loaded with a 162gr bullet with 61grs of Reloader 19 the velocity will be approximately 2800fps with a pressure around 43500psi. (Both loads can be found in Hodgdon's 26th edition.)What's the difference? Both cartridges are pushing a 160+ grain bullet at about 2800fps at close to the same pressue levels. My chronograph tells me that the velocities for both loads are close.
I don't know anything about the wsm's, but physics tells me that if they can develope the same pressure as the standard length or magnum length cartridges then there should be very little difference velocities.
