6.5 Weatherby RPM cartridge

[Magnum_Willys]

If you're referring to Defensive Edge's +P throat, you do know it has absolutely 100% nothing to do with freebore, right?

Long Freebore- bore rider - +p  = All the same concept .   Run a throater into the chamber and remove short length of part or all of the lands so bullet has less initial resistance creating a slower pressure ramp.   Weatherby takes all the lands out for 3/8”,  bore rider a little less, +p only half the lands removed.

[b23]

If you're referring to Defensive Edge's +P throat, you do know it has absolutely 100% nothing to do with freebore, right?

Long Freebore- bore rider - +p  = All the same concept .   Run a throater into the chamber and remove short length of part or all of the lands so bullet has less initial resistance creating a slower pressure ramp.   Weatherby takes all the lands out for 3/8”,  bore rider a little less, +p only half the lands removed.

I agree that the end goal of flattening the pressure curve is what they all are trying to achieve but it's how they go about it that is a fair bit different.