My .22-250 cases seem to have a bit of black (carbon residue) on the case necks after being fired. What causes this? Is this a condition to be worried about?
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Carbon on case necks?
- Thread starter Sgt_Jamez
- Start date
Re: Carbon on case necks?
nothing to worry about.the case when fired did not fully form to the chamber to seal it off.so it let some of the gases blow back.I am guessing it is a factory chamber.but if you are reloading for it steelwool or a scotch brite pad will clean it off.
nothing to worry about.the case when fired did not fully form to the chamber to seal it off.so it let some of the gases blow back.I am guessing it is a factory chamber.but if you are reloading for it steelwool or a scotch brite pad will clean it off.
Re: Carbon on case necks?
My 22-250 did the same thing with certain cases . I fixed it by neck turning a very slight ammount just to straighten up the necks some and upping the powder load a small ammount. Also annealing the necks which I had never done before for the 22-250 .
Also giving the chamber a good scrub may have helped also .
My 22-250 did the same thing with certain cases . I fixed it by neck turning a very slight ammount just to straighten up the necks some and upping the powder load a small ammount. Also annealing the necks which I had never done before for the 22-250 .
Also giving the chamber a good scrub may have helped also .
Re: Carbon on case necks?
I think powder may have something to do with it as well. In my 7mmRM with RL25 the cases come out clean, but with Retumbo there's a lot of black on the necks. I'm pretty sure it isn't a low pressure issue. I never worried too much as it comes off with a couple of hours in the tumbler.
I think powder may have something to do with it as well. In my 7mmRM with RL25 the cases come out clean, but with Retumbo there's a lot of black on the necks. I'm pretty sure it isn't a low pressure issue. I never worried too much as it comes off with a couple of hours in the tumbler.
Re: Carbon on case necks?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Victor N TN</div><div class="ubbcode-body">A couple of twists in some 4/0 steel wool will take it right off. </div></div>
A Scotch Brite pad works too.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Victor N TN</div><div class="ubbcode-body">A couple of twists in some 4/0 steel wool will take it right off. </div></div>
A Scotch Brite pad works too.
Re: Carbon on case necks?
Neck soot indicates leakage past the neck/chamber seal.
In general, less pressure is present than would be ideal to complete the seal.
It would be easy, and irresponsible, for me to suggest you need more pressure, because this is only one of the likelier causes.
Another cause is hardening of the neck brass due to repeated working/reloading. Often, this is an early indicator that brass is aging to nearly past its best-by stage.
Annealing the necks can restore the brass's suppleness.
Only increase pressures as long as the other pressure indicators demonstrate it would be safe to do so.
Greg
Neck soot indicates leakage past the neck/chamber seal.
In general, less pressure is present than would be ideal to complete the seal.
It would be easy, and irresponsible, for me to suggest you need more pressure, because this is only one of the likelier causes.
Another cause is hardening of the neck brass due to repeated working/reloading. Often, this is an early indicator that brass is aging to nearly past its best-by stage.
Annealing the necks can restore the brass's suppleness.
Only increase pressures as long as the other pressure indicators demonstrate it would be safe to do so.
Greg
