Jump-to-the-lands question

[katzdad]

After doing some careful measurements, I find that my 7.7 Japanese 125 grain bullet reload will jump-to-the-lands .32 of an inch. I also checked and determined that the 180 grain Norma bullet jumps .22 of an inch. Is this excessive, or dangerous? Will I loose any gas before the bullets reach the lands?
Thanks,
Max

[jimkim]

Originally Posted by katzdad

After doing some careful measurements, I find that my 7.7 Japanese 125 grain bullet reload will jump-to-the-lands .32 of an inch. I also checked and determined that the 180 grain Norma bullet jumps .22 of an inch. Is this excessive, or dangerous? Will I loose any gas before the bullets reach the lands?
Thanks,
Max

You might get more info if you post in the handloading forum.
Handloading

[katzdad]

Originally Posted by jimkim

You might get more info if you post in the handloading forum.
Handloading

I found it after posting the two above threads. Got lots of good replies, too.
Thanks,
Max

PS...(Paraphrased) Rabbi Hillel was challenged to explain all the teachings of the Talmud while standing on one leg. He lifted a foot and said, ""That which is hateful to you, do not do to your fellow." He then lowered his foot and said, "All of the rest is merely commentary."

[Greyhawk50]

Hey katzdad;
As I stated earlier, I'm not an expert.
To help answer your question about the bullet to rifling gap "freebore" you might find the following link interesting.
Hornady
Scroll to the bottom of the article to find your answer.
Freebore is a good thing. The accuracy can be improved or made worse by changing the AOL but as this article indicated, zero freebore can take the chamber pressure above the safe range. Keep in mind that energy is required to start the bullet in motion, then energy is required to engage the bullet into the rifling. The elapsed time is in milliseconds but trying to do both at the same time can be dangerous.

Sorry, I posted this in the other thread. It's worth repeating.