Random ring around the bullet

[Squ1dward]

So, there I was... Loading up some 230gr 45 ACP. After about 250 rounds I started getting a ring around the top of the bullet after it went thru the seating die. The Die was properly tight and did not appear to have moved from when I set it. I popped the tool head off and inspected and cleaned the die. No debris. Not sure how this just started happening. Any ideas?

[Carsgunsandchics]

Are you having to pull harder to seat them? Maybe your bell adjustments have moved a little and not opening up the case mouth enough causing more pressure to press the projectile in leaving the ring.

[chknlyps2]

Wrong seating stem for the bullet profile, leaves a mark when you have brass with more spring back when sized causing more neck tension.

[maxx03]

Wrong seating stem for the bullet profile, leaves a mark when you have brass with more spring back when sized causing more neck tension.

^ +1

[reckoner]

So, there I was... Loading up some 230gr 45 ACP. After about 250 rounds I started getting a ring around the top of the bullet after it went thru the seating die. The Die was properly tight and did not appear to have moved from when I set it. I popped the tool head off and inspected and cleaned the die. No debris. Not sure how this just started happening. Any ideas?

Was this a Dillon die?

My Dillon 9mm seating die did the same thing. The seating stem was not a good match for the ogive of the bullets I used, so instead of contacting the bullet somewhere close to the case mouth, it contacted on the bullet tip. And since the stem had a small hole going down the middle, it left a small ring around the tip.

[bruce381]

are you seating and Crimping in same die?

[noylj]

If it just started, remove the seating stem and inspect it.

[JMP]

Is it just a light mark or is it an imprint on the bullet. If it's just a light mark that's probably normal. If it is an imprint, you likely have too much neck tension so the seater is pushing down too hard on a soft bullet.

[orangeusa]

So, there I was... Loading up some 230gr 45 ACP. After about 250 rounds I started getting a ring around the top of the bullet after it went thru the seating die. The Die was properly tight and did not appear to have moved from when I set it. I popped the tool head off and inspected and cleaned the die. No debris. Not sure how this just started happening. Any ideas?

Pictures tell 1000 stories.

.

[stilly]

Wrong seating stem for the bullet profile, leaves a mark when you have brass with more spring back when sized causing more neck tension.

+2

Damn beat me too it...


I was gonna say wrong profile of the seating stem. Get a Lee die. I noticed that they seem to work on everything.

[DocSkinner]

all your brass trimmed to size? if you have some just a tad longer than what you set the die for (and especially if you set it to crimp), you will get more crimp on those, and you could be still pushing down on the bullet after it is crimped - so then the seater will dig in as the bullet doesn't want to move any farther.

[J-cat]

Most standard dies have universal seating stems and there is not a "wrong" one in them.

The reason there is a ring on the bullet nose is because you are using soft bullets, prolly plated, and the case tension is high enough to cause the bullet to swage itself into the seating stem.

If you use jacketed bullets you'll have less of a ring or none at all. It's not anything that you should be worried about unless it is heavy and deep and deforms the nose.

[Toolbox X]

I had the exact same problem. The seating stem has 2 sides, one for flat point and one for round point. The edges of the round point stem were contacting the bullet and made a ring every time it seated a bullet. I used a Dremel to take those edges down and now I don't get a ring. Doing this will slightly affect the OAL so adjust accordingly.

[RR.44]

all your brass trimmed to size? if you have some just a tad longer than what you set the die for (and especially if you set it to crimp), you will get more crimp on those, and you could be still pushing down on the bullet after it is crimped - so then the seater will dig in as the bullet doesn't want to move any farther.

^^^^This is the problem^^^^
The die has already crimped the case and you are still pushing down on the bullet, many here don't trim pistol brass as they feel it is unnecessary , however, what you describe is caused by brass that is varying in length.

[reckoner]

This thread might help: https://www.calguns.net/calgunforum/...d.php?t=988186

And this one: http://www.northeastshooters.com/vbu...n-650-question

To get rid of the ring, I bought a Lee seating die for my 650.