I seat it, lift the handle slightly and rotate cartridge slightly 1/4-1/2 rotation and seat again. Don't know if it matters but thats how I dow it. I wouldn't worry about that one or two thou yet, it'll be fine. You are splitting hairs for a load that you dont even know will work yet. Go out and shoot them, get the cases fireformed then worry about the fine details. Once I know they fit in the magazine and feed properly I dont care about the OAL measurement (only CBTO)
You still need to make sure the bullet tip isn't bottoming out in the seating stem, and that it's not binding on the bottom edge of the stem. It should seat into the stem on the ogiveI am using a Redding VLD Micrometer Seating stem....that is what Redding advised for me to get for Ballistic Tips, Vmax and Amax type bullets.
Different lots of bullets may vary on the length from the bottom of the bullet to the ogive. That's why I buy bullets in large quantities of the same lot. If they vary much within the same lot, you need to find a new bullet manufacturerAs long as the ogive is in the same place on the bullet. I've seen as much as .025 difference in different lots of the same bullet.
Some manufacturers bullets are more consistent than others in the same lots also.
I use a single stage Rock Chucker press. I drop powder charges to within 0.5 gr or so of desired then trickle up to the exact weight. I get one round done perfectly, measured with a dial caliper. Then I proceed to process 49 more rounds. I check concentricity on each round, and I check the length of each with the dial caliper. It takes longer to get things done, but when I take that shot and miss the only thing I can question is the jerk behind the trigger.Hey
How does everyone seat their bullets?
Here is what I’ve done so far:
1)Seated bullet to OAL perfectly
2)Measure CBTO on that bullet and seat the rest
3)Check each bullet after seating
What I’m finding is that there are variables, I’m assuming in the bullet shape (40gr Nosler Ballistic Tip)
So do I go back and get them all to the same CBTO or Micro adjust seater for each bullet? For example seat cartridge 1, then back seater off and seat cartridge 2 and repeat?
Do you use a good quality in-line bullet sweater? If so, and you're having concentricity problems, you may have other problemsI have found that seating the bullet, then turning the round and a second seating helps with concentricity. When done with them all, I then check each round for concentricity and adjust as needed with a Hornady Concentricity Gauge. I accept .002 or less. So far, that works for me.
That's the deal, its not overall length its finding your OAL where the bullet hits the lands, and setting your seating die and not worrying about individual cartridge lengths. The Ogive is part way down the bullet and is where your seater is locating on. Once the seater is set lock it down and load all your rounds to same distance off lands.If your checking at the Ogive, they should all be the same at the point that matters.
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