Comments on: Long Range Load Development for F-Class

By: Herman Harke

Herman Harke — Thu, 02 Nov 2017 00:23:50 +0000

Key point he did not point out is where the vertical node was, notice the closeness of the muzzle velocity and then the larger jumps before and after the mode. I have found the chrono is an accurate tool to help validate a node

By: Gene D

Gene D — Wed, 01 Nov 2017 17:05:48 +0000

I’ve noticed that the majority of shooters who “jam” use 6mm , 6.5 , etc.
Yet .308 gunners like Brian Litz and others tend to recommend “jumping”. Maybe it’s got something to do with chamber pressure ?

Articles like this are excellent reference information , but I would suggest that including the caliber and case size could be invaluable to preventing some novice re-loader from a catastrophic accident . Sometimes it’s what is not said that can be dangerous .

By: js

js — Wed, 01 Nov 2017 16:51:41 +0000

No. His jam length is 3.477.

The lengths of the rounds tested for OAL are all less than that. They range from 3.460 to 3.470.

The confusion is probably from the sentence “I usually start at jam length and move the depth in 0.003 until I get to 0.015 deeper than jam.”

Deeper, in this case, would mean ‘deeper into the case.’

I had to read it twice to avoid the same conclusion.

Editor: Jerry — You are absolutely correct. I added an Editor’s comment to clarify this. Walker move the bullet deeper into the case in .003″ increments, ending up with a COAL .007″ shorter than max jam length.

By: Terry Balding

Terry Balding — Wed, 01 Nov 2017 16:13:39 +0000

So you “jam”, and then jam more.
No attempt at zero, or jumping?