zacii
Beginner
- Mar 5, 2015
- 113
- 1
I just picked up a Hornady Comparator set for bullet seating depth, and the headspace bushings for bumping shoulders.
I loaded up a ladder test sometime ago, and just used the 2.2" COAL found in my Barnes data for the 53 grain TSX.
Note the depth of the bullet to the last ring:
Then, I took a piece of sized brass and split the neck with my bandsaw (to make it easier to seat the bullet in my chamber) in an attempt to measure how far to my lands. I used a Sharpie to color the bullet so I could see the lands touching.
I was surprised to see how much bullet there was sticking out of the brass. So, I took a regular piece of brass, sans bandsaw cut, and colored it and ran it through the action. This time I got more definite land marks on the bullet, but it was still way out there.
The difference between the split dummy case and the regular dummy case was .030".
The difference between the standard case seated to 2.2 COAL and the split dummy case was .165".
The difference between the standard case seated to 2. 2 COAL and the standard dummy case was .194".
A few questions:
Is this a normal amount of freebore from magazine length to the lands?
I don't know which measurment to go off of, the split case or the regular case. I can clearly see the land marks on the bullet in the regular case, but I'm wondering if it jammed it in there tight and I'm actually into the lands a little ways. Whereas, the split case didn't require so much force to seat the bullet and a due to less neck tension, the bullet stopped right at the lands. What say you more experienced guys?
I loaded up a ladder test sometime ago, and just used the 2.2" COAL found in my Barnes data for the 53 grain TSX.
Note the depth of the bullet to the last ring:
Then, I took a piece of sized brass and split the neck with my bandsaw (to make it easier to seat the bullet in my chamber) in an attempt to measure how far to my lands. I used a Sharpie to color the bullet so I could see the lands touching.
I was surprised to see how much bullet there was sticking out of the brass. So, I took a regular piece of brass, sans bandsaw cut, and colored it and ran it through the action. This time I got more definite land marks on the bullet, but it was still way out there.
The difference between the split dummy case and the regular dummy case was .030".
The difference between the standard case seated to 2.2 COAL and the split dummy case was .165".
The difference between the standard case seated to 2. 2 COAL and the standard dummy case was .194".
A few questions:
Is this a normal amount of freebore from magazine length to the lands?
I don't know which measurment to go off of, the split case or the regular case. I can clearly see the land marks on the bullet in the regular case, but I'm wondering if it jammed it in there tight and I'm actually into the lands a little ways. Whereas, the split case didn't require so much force to seat the bullet and a due to less neck tension, the bullet stopped right at the lands. What say you more experienced guys?