Does Berger Make Jump Irrelevant?

[FEENIX]

Thanks. I read some other threads written by folks frustrated with the OAL tool. Finally figured out the obvious - you can't treat a plastic tool like a metal tool. I was shoving the bullet way too far in the lands because the give in the plastic was confusing me. So I wound up sizing the neck of the modified cartridge up a touch so there's no resistance. That way I can feel the "touch" better. Also learned to very gently lock it down so the plastic rod doesn't walk on me.

This resulted in 10 readings with 5 thou from each other. I also used a cleaning rod to push the bullet back out, and paid attention to whether the bullet "stuck" in the land a bit much. Disregarded those and got 3 thou consistency.

Much more faith in my readings now. Still keeping 30 thou off the lands, just to be safe.

The video provided by @sjt18 in #46 addressed that. Because I have all the reamers for my last custom build, my GS made me this handy tool ...

 

[bob812]

Depends on what bullet you use. For instance, on my .257 WBY, below are bullets I have. From L-R, 110 Sierra, 145 Black Hole, and 163 Chinchaga. With the 145 and 163, it has no problem touching the lands.

View attachment 608274

How do Dale's Chicnhaga bullets shoot for you?

 

[FEENIX]

How do Dale's Chicnhaga bullets shoot for you?

Please check your PM.

Ed