Annealing wrecked my groups

[lash]

Practice rounds.
But glad that you got it figured out.

 

[spife7980]

Pull a handful, brush the neck, and reseat and see how that goes. May luck out.

 

[BLKWLFK9]

Pull a handful, brush the neck, and reseat and see how that goes. May luck out.

Did 10 tonight. We will find out tomorrow.

 

[gigamortis]

I ultrasonic clean and anneal every firing before neck sizing via a Lee Collet Die with excellent results in my 6.5CM. .25 MOA at 100yds if I do my part and my SDs are single digit. I do not tumble afterwards or brush necks at all since my necks are clean from the ultrasonic process. I do use mica for neck lube before seating bullets. I once tried SS pin tumbling, but bullet grip was too slick from the SS pins polishing the neck too well and my SDs and ES doubled from it.

I use the Boretech brass cleaning solution in my ultrasonic cleaner. I can fit 40 pieces of brass neck down in a in a 400ml beaker and use 40:1 ratio of Boretech concentrate just in the beaker. I fill up the rest of my ultrasonic tub with water. 20 minutes cleaning followed my a manual rinse followed by a 20 minute ultrasonic rinse in the water that was outside of the beaker gives me tarnish free brass with no color changing over time. I have found that not ultrasonically rinsing afterwards will cause a 20fps degradation in velocity in rounds loaded for 2 months or more. I anneal right after my ultrasonic regimen which ends up drying the brass from the heat.

The only difference I see between my annealing regimen and the OP's is that I have clean necks before annealing. Perhaps carbon in the necks during annealing is the issue?

 

[918v]

I ultrasonic clean and anneal every firing before neck sizing via a Lee Collet Die with excellent results in my 6.5CM. .25 MOA at 100yds if I do my part and my SDs are single digit. I do not tumble afterwards or brush necks at all since my necks are clean from the ultrasonic process. I do use mica for neck lube before seating bullets. I once tried SS pin tumbling, but bullet grip was too slick from the SS pins polishing the neck too well and my SDs and ES doubled from it.

bull shit

 

[gigamortis]

bull shit

Believe what you want, but my magnetospeed and results on paper at long range for vertical dispersion verify my findings. I'll keep doing what I'm doing and you keep doing what works for you. I'm just here to offer suggestions based on what has worked for me like most of the other grown-ups on this forum are here to do to try and help the OP solve his issue.

 

[918v]

Believe what you want, but my magnetospeed and results on paper at long range for vertical dispersion verify my findings. I'll keep doing what I'm doing and you keep doing what works for you. I'm just here to offer suggestions based on what has worked for me like most of the other grown-ups on this forum are here to do to try and help the OP solve his issue.

Your statement that stainless tumbling overpolishes the inside of the case neck is bullshit.

I tumble cases for 10-12 hours at a time. Over the lifetime of a case it sees over 100 hours in stainless media. if your claim was true the neck would be completely polished away.

I have a 21st Century arbor press with a hydraulic gauge and can see no decrease in seating pressure over time due to stainless tumbling.

 

[DellaDog]

A couple people mentioned to me how they need to tumble for a long time post annealing.

Did they say why?

 

[BLKWLFK9]

Did they say why?

yea, the change in the metallurgy composition inside the neck leaving something in there that will cause bullet grip issues, which causes erratic release of the bullet, which causes shitty groups...

ive got ten rounds with the bullets pulled and necks brushed then reloaded to test.

 

[gigamortis]

Your statement that stainless tumbling overpolishes the inside of the case neck is bullshit.

I tumble cases for 10-12 hours at a time. Over the lifetime of a case it sees over 100 hours in stainless media. if your claim was true the neck would be completely polished away.

I have a 21st Century arbor press with a hydraulic gauge and can see no decrease in seating pressure over time due to stainless tumbling.

What amount of neck tension do you run? I run .001”-.002” neck tension, and I could definitely notice a lighter seating pressure after my experience with SS pin tumbling. Keep in mind that prior to this, I have been accustomed to seating bullets into ultrasonic cleaned necks that have been annealed. I would definitely like to find out why my experience with SS pin tumbling differs from yours, as I do like how clean my brass was with the SS pin tumbling.

 

[BLKWLFK9]

Now keep this in mind. What im about to say is coming from someone who has never SS tumbled before. At the match last weekend, i talked to my buddy who is on the US Fclass team and takes his reloading to another level. He says that when they SS tumble, they media tumble before seating bullets just to get the dust inside the necks. When he and his team mates load their ammo, they seat the bullets about .030 too long, then when they get to the match, the seat the bullets to their correct lengths before they shoot them. His reasoning is the bullets will bond to the necks and fuck up neck tension so when they seat the bullets prior to shooting them, it breaks that bond and you get correct neck tension. Now, im not saying any of this from experience. Im only relaying what i was told about the subject. Its apparent to me that as long as i tumble the brass appropriately after annealing, there's no drama at all. Im ok with that, now that i replaced the tumbler.

 

[whatsupdoc]

I SS tumble, anneal, resize, trim, ultrasonic clean. My necks are spotless and I do not use any lube to seat the bullets.
I use only Dawn to tumble and ultrasonic clean and do not sort any cases or bullets.

25" Krieger 6.5 Creed

Stats - Average 2799.15 fps
Stats - Highest 2806.38 fps
Stats - Lowest 2792.7 fps
Stats - Ext. Spread 13.69 fps
Stats - Std. Dev 4.66 fps

Shot ID V0 Date Time
1 2793 9/11/2020 10:12:21
2 2799 9/11/2020 10:12:49
3 2794 9/11/2020 10:13:13
4 2803 9/11/2020 10:13:40
5 2795 9/11/2020 10:14:02
6 2803 9/11/2020 10:16:54
7 2802 9/11/2020 10:17:20
8 2797 9/11/2020 10:17:50
9 2804 9/11/2020 10:18:30
10 2793 9/11/2020 10:18:52
11 2796 9/11/2020 10:32:07
12 2806 9/11/2020 10:32:33
13 2803 9/11/2020 10:33:17
14 2795 9/11/2020 10:34:27
15 2803 9/11/2020 10:34:58

 

[mbeavers1]

I SS tumble, anneal, resize, trim, ultrasonic clean. My necks are spotless and I do not use any lube to seat the bullets.
I use only Dawn to tumble and ultrasonic clean and do not sort any cases or bullets.

25" Krieger 6.5 Creed

Stats - Average 2799.15 fps
Stats - Highest 2806.38 fps
Stats - Lowest 2792.7 fps
Stats - Ext. Spread 13.69 fps
Stats - Std. Dev 4.66 fps

Shot ID V0 Date Time
1 2793 9/11/2020 10:12:21
2 2799 9/11/2020 10:12:49
3 2794 9/11/2020 10:13:13
4 2803 9/11/2020 10:13:40
5 2795 9/11/2020 10:14:02
6 2803 9/11/2020 10:16:54
7 2802 9/11/2020 10:17:20
8 2797 9/11/2020 10:17:50
9 2804 9/11/2020 10:18:30
10 2793 9/11/2020 10:18:52
11 2796 9/11/2020 10:32:07
12 2806 9/11/2020 10:32:33
13 2803 9/11/2020 10:33:17
14 2795 9/11/2020 10:34:27
15 2803 9/11/2020 10:34:58

I have been doing almost the same process as you except I SS tumble after sizing. I did find that usine Imperial Dry Lube definitely improved my sd/es. Small sample from yesterday was a 5shot group to confirm for match Saturday, 4 SD and 9 ES @ 2915fps in a 6CM w 115 DTACS.

 

[918v]

What amount of neck tension do you run? I run .001”-.002” neck tension, and I could definitely notice a lighter seating pressure after my experience with SS pin tumbling. Keep in mind that prior to this, I have been accustomed to seating bullets into ultrasonic cleaned necks that have been annealed. I would definitely like to find out why my experience with SS pin tumbling differs from yours, as I do like how clean my brass was with the SS pin tumbling.

I run .002” neck tension achieved by a Lee collet neck die. I also use Imperial dry lube to make bullet seating smooth. Seating pressure increases with every reload cycle as the neck hardens. When I anneal, which I do sparingly, I also use imperial dry lube otherwise the bullets are impossible to seat correctly. I don’t anneal more to make the neck softer so the bullets can go in easier. That’s a bad practice for magazine fed ammo.

 

[whatsupdoc]

Now keep this in mind. What im about to say is coming from someone who has never SS tumbled before. At the match last weekend, i talked to my buddy who is on the US Fclass team and takes his reloading to another level. He says that when they SS tumble, they media tumble before seating bullets just to get the dust inside the necks. When he and his team mates load their ammo, they seat the bullets about .030 too long, then when they get to the match, the seat the bullets to their correct lengths before they shoot them. His reasoning is the bullets will bond to the necks and fuck up neck tension so when they seat the bullets prior to shooting them, it breaks that bond and you get correct neck tension. Now, im not saying any of this from experience. Im only relaying what i was told about the subject. Its apparent to me that as long as i tumble the brass appropriately after annealing, there's no drama at all. Im ok with that, now that i replaced the tumbler.

While I would not argue with a winning shooters reloading process, I personally have never experienced the bullet bonding to the case.
I have read quite a few posts about this but don't know if this is simply a corrosion issue between the brass (that is mostly copper) and the bullet or is there some chemical from the reloading process that is left behind on the bullet or case causing the corrosion/bonding.


A while back I dissected some old ammo I reloaded (have done this many times never had a bonded bullet) there was no signs of the bullet bonding to the case after 36 years. There was some corrosion on the base of the boat tail that appears to be caused by the bullet crushing the powder (compressed load).

https://www.snipershide.com/shooting/threads/dissecting-old-reloads.6978918/#post-8199373

Just throwing some stuff out there. Food for thought.

 

[kindabitey]

Just my opinion, but I think the "cold weld" of bullets to case necks was probably a real thing back when bullet jackets were almost pure copper and
casings were truly made from almost pure brass.