Is this ring on my jacket rifling?

[SDHNTR]

It’s really not. The standard rcbs seater doesn’t contact the bullet that far down. It will contact just below the red tip.

Upon a closer read you’re right. The ring appears to be on the ogive, not on the nose. And if it doesn’t come out of the seater die like that and only happens after you chamber a round and are not jamming, you have a chamber issue or a bullet out of spec. Did it do this on every bullet you tried?

 

[Outdoorsman12b]

Upon a closer read you’re right. The ring appears to be on the ogive, not on the nose. And if it doesn’t come out of the seater die like that and only happens after you chamber a round and are not jamming, you have a chamber issue or a bullet out of spec. Did it do this on every bullet you tried?

Yes every one that I checked after chambering. The wear on the jacket increases the more it is chambered.

 

[Pickettpuncher]

Is it possible that you’re closing the bolt, turning the cartridge in the chamber, and it’s contacting the lands, hence a ring and not individual lands marks.

 

[SDHNTR]

Why are you seating out so far? That bullet is barely held in the neck!

 

[35WhelenAI]

For grins, have you measured bullet diameter along the shank and at the mark to gauge if the bullet is in/out of spec? Does the ring from chambering happen at the same place as the ring from the comparator? However, with the Berger VLD in the pic on the previous page, looks to be the same happening.

 

[packer58]

Get your hands on a bore scope, i have a Teslong WIFI model that pairs with my i phone. Take a look at the front of the chamber in the neck, throat, leed area. Your pic in post #30 shows a ring "i think" well above the bearing surface ogive junction, that would be troubling to me, as was mentioned, you might try marking up another round and chamber without closing the bolt so there is no rotation, check for marks, then incrementally close the bolt a little further and check for marks.

 

[Outdoorsman12b]

Why are you seating out so far? That bullet is barely held in the neck!

The bullet in pictures sharpied up is not where I seat for loading if that’s what you mean. That is a dummy round to establish jam. All my live rounds are loaded minimum of boat tail at neck shoulder junction as illustrated below from precision rifle blog.



If this is unsafe please let me know.

 

[35WhelenAI]

Something that seems out of place here is a factory load did not get a ring on it. Was this a factory load with the SAME bullet as you are loading? Haven't heard an answer on that but wanted to asked for a third time in case it was missed.

 

[Outdoorsman12b]

For grins, have you measured bullet diameter along the shank and at the mark to gauge if the bullet is in/out of spec? Does the ring from chambering happen at the same place as the ring from the comparator? However, with the Berger VLD in the pic on the previous page, looks to be the same happening.

It’s always below the comparator by about 80 thou. I have run into a few guys at the range who are PRS and have had issues with various lots of this particular bullet and I have noticed inconsistencies in OAL which is why I use the comparator. I really don’t want to get that far down the rabbit hole on this though. Appreciate the suggestion 35.

 

[35WhelenAI]

Inconsistency does happen, what is the bullet diameter of this batch?

 

[Outdoorsman12b]

Upon a closer read you’re right. The ring appears to be on the ogive, not on the nose. And if it doesn’t come out of the seater die like that and only happens after you chamber a round and are not jamming, you have a chamber issue or a bullet out of spec. Did it do this on every bullet you tried?

I will check every round on the next batch I load up.

 

[stanginthe11s]

well, here's my opinion since it seems you're further along than I thought. if your load has been proven safe and your only concern is the visual aspect, then don't worry about it and keep shooting. if you find the bullets out of spec, change them. you could also have a tight throat. even if you loaded shorter, the bullet will be subject to the same thing once fired. what matters the most is that it is a safe load, then if the rifle is happy and shoots the way you want you leave it. let the gun and the cartridge tell you if there's a problem.
as far as how long you seat, basic rule is min. of bullet dia. in the neck. that is bearing surface only, does not include tail.

 

[SDHNTR]

I will check every round on the next batch I load up.

Try another lot.

 

[Pickettpuncher]

Try another lot.

I’m still waiting, along with the others, for that diameter measurement.

 

[SDHNTR]

The bullet in pictures sharpied up is not where I seat for loading if that’s what you mean. That is a dummy round to establish jam. All my live rounds are loaded minimum of boat tail at neck shoulder junction as illustrated below from precision rifle blog.

View attachment 494126

If this is unsafe please let me know.

Ok, that should be good on seating depth. At least for functionality. Accuracy may require some tweaking.

As others have alluded to, you have a somewhat strange method of doing this, or at least communicating how you are doing it. Lots of unanswered questions.

 

[35WhelenAI]

I’m still waiting, along with the others, for that diameter measurement.

This is my fourth time as well asking if the factory load that had no ring was with the same bullet in a factory load...

Comparing a factory load and noting it has no ring, if it's a different bullet, has little to no bearing on the problem and subsequent solution. However if it is the same bullet, then it kinda has revealed the problem.

 

[stanginthe11s]

35, just a guess but given the cartridge and the bullet I'm going to say yes, the factory round was the same bullet. now that I guessed that, I'll be wrong lol.
what I'm curious about now is, is that typical for a tikka to have that nice tight throat? I don't own one, but it can be factor for their accuracy.

 

[BULLBLASTER]

This is caused by the bullet being dragged out of the throat upon extraction of the live round. The ejector plunger is constantly putting pressure on the round to the side and thus presses the bullet against one side of the throat as the extractor drags it out. Nothing to be worried about.

 

[35WhelenAI]

I like the idea of the plunger being part of it, however the ring is the full circumference of the bullet and doesn't do it with factory rounds. Not the plunger and subsequent angle of the bullet on extraction, IMO.

 

[BULLBLASTER]

I still wouldnt put any thought into it if it shoots as its supposed to.