Seating gone crazy hard

[Rustynutz]

Ok. Got wierd stuff happening ..
Same Brass ive shot in rifle ,Same projectile ,Same seating depth , Same fl bush die ,( wilson ) , Same size bush , Same annealing method , & projectiles have allways seated smooth ,& easy . .
Now all sudden i have Very hard seating pressure . .
Only thing ive done different is tumble brass Then anneal . Has this stuffed my brass. I usualy never tumble clean.
Neck all measure same as before after firing & After sizing .
Has me stumped .
Has All the brass just failed at same time .which is vey hard to believe

 

[gambleone]

What brand & how many times fired?

 

[243winxb]

Zinc removed.

Edit/add. When the surface of the brass is cleaned for to long, the surface zinc is removed. Zinc acts as a lube. "Squeaky" clean brass produces more friction.

Google can find reloaders that forgot the tumbler was running. The pistol brass, when run thru a carbide die become much harder. They end up appling case lube to there 9mm brass.

And yes, a torch may burn off the surface zinc also. +

 

[6BRA]

Plenty on here on inside necks after tumbling or ultrasonic cleaning.

 

[6BRA]

Zinc removed.

Nope

 

[stevenpoplin]

bearing surface of bullet ahead of neck shoulder junction?

 

[Rustynutz]

Zink has not been removed . .
Its adi brass fired only 5 times .
Annealed twice in that time . . Im now thinking annealing After tumbling wrecked it . As ive never tumbled them before

 

[jasophil1]

Tumbling peens end of case mouth.

 

[whatsupdoc]

Make sure the edge is properly chamfered, and the inside of the neck is clean.

 

[Rustynutz]

Yep mate. I allways champer necks & clean inside necks with brush . .

 

[Rustynutz]

Tumbling peens end of case mouth.

So should i just go back to cleaning without tumbling . Brass is buggered now so will be getting new batch

 

[Dub]

I wouldn't give up on that brass yet.

 

[whatsupdoc]

So should i just go back to cleaning without tumbling . Brass is buggered now so will be getting new batch

Heck no, just chamfer the case neck

 

[INTJ]

May have cleaned the carbon out of the necks

 

[Bill Norris]

Make sure the inside of the necks have some dry lube, chamfer and deburr, and load it.

 

[joshb]

So should i just go back to cleaning without tumbling . Brass is buggered now so will be getting new batch

No...I’ve done it hundreds of times. Check your chamfer. I recently loaded some 7.62x39 blaster ammo. I thought, since it was blaster ammo, I’d just skip the chamfer step. The first 50 were hard as hell to seat so I chamfered the next 50. Night and day difference in seating pressure.

 

[rijndael]

Tumbling after annealing makes a huge force difference for me.

 

[Rustynutz]

No...I’ve done it hundreds of times. Check your chamfer. I recently loaded some 7.62x39 blaster ammo. I thought, since it was blaster ammo, I’d just skip the chamfer step. The first 50 were hard as hell to seat so I chamfered the next 50. Night and day difference in seating pressure.

I will give that a go shortly . See how it goes

 

[6BRA]

I would never pin tumble prepped brass, get an ultrasonic, no damage

 

[joshb]

I will give that a go shortly . See how it goes

.....but check that bushing again. Somebody might be playing tricks on you.
Ticked off the misses lately? Got a kid in the house?