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Author Topic: 6.5 Weatherby RPM cartridge  (Read 6891 times)

Offline Magnum_Willys

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Re: 6.5 Weatherby RPM cartridge
« Reply #30 on: March 10, 2021, 07:45:41 AM »

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.


Offline b23

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Re: 6.5 Weatherby RPM cartridge
« Reply #31 on: March 10, 2021, 08:21:50 AM »

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.

 


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