After a while, it stops being funny.Yes, but you missed the entertainment.
Rick

After a while, it stops being funny.Yes, but you missed the entertainment.
Rick
This is kinda a follow a follow on from the "is this case stuffed thread"
Can any of the experienced shooters here confirm that when you are getting soot on case necks due to neck not sealing properly before bullet release does those hot gases cause erosion of the chamber in the area where the neck is not sealing properly??
Thanks
What Greyfox said!Ignore is sweet! I missed the middle distraction.
Oh, but how about that abrasive powder and it's convergence point with long necks and steep shoulders. More conjecture. I'm the one mentioning the brass in this context but many are claiming it is a serious factor to barrel life. Again, IMHO...conjecture.My take on the OP’s question is that the soot seen on necks is there from the very first bit of combustion products escaping upon ignition, maybe just as the bullet’s leaving the case. Pressures & temps aren’t nearly as high as a few microseconds later when the neck’s expanded enough to seal the back end.
As others suggest it’s throats that suffer, not chamber necks....
Oh, but how about that abrasive powder
Not conjecture, just something I did not know. I am glad you could straighten it out so convincingly. Nice visual aid too!I see no parallel flame cutting or anything of the such...and never have, in several of these chamber disections that I've done over the years. I think the whole notion more unbased conjecture.
My post wasn't directly to you, since I didn't see anywhere you making suppositions about chamber erosion. But, a picture is often worth 1000 words. What doesNot conjecture, just something I did not know. I am glad you could straighten it out so convincingly. Nice visual aid too!![]()
I think Pigdog started this thread based on something I said in another thread. The faces are just that most people will give a long winded explaination that may be hard to follow, whereas you had just the right item to definitively show the answer to his exact question.My post wasn't directly to you, since I didn't see anywhere you making suppositions about chamber erosion. But, a picture is often worth 1000 words. What doesmean?
+1 on number 3 here.. You may just need to clean it really well or step up the charge a little bit... I get some soot on necks even when useing factory ammo or reloads in every rifle I shoot.. seems pretty normal on the necks , not so much all the way back to the shoulders... Are you just shooting underpowered reloads..???thanks mike this is the sort of knowledge I'm looking for.
Guys can we keep the topic on hand if possible I'm not sure what is going on between fguffey and the others but I'm more interested in if anyone can offer practical advice on where I go to from here I'm thinking of the possible following scenarios.
1.) increase loads so that I'm running at absolute max pressure of 63kpsi (not real keen on this)
2.)Size necks with a bushing down to .279 thoughts on this?
3.)don't worry about it continue shooting and get a chamber cleaning kit and clean regularly
4.)put the gun in the safe until I can afford new lapua brass, neck turning gear and a new full length sizing die as recommended in the article on this site about neck turning before getting started he said you need to full length size with a non bushing die which I don't have.
5.) other?
thanks for keeping on topic
This is kinda a follow a follow on from the "is this case stuffed thread"
Can any of the experienced shooters here confirm that when you are getting soot on case necks due to neck not sealing properly before bullet release does those hot gases cause erosion of the chamber in the area where the neck is not sealing properly??
My 6.5x47l has a .286 neck. Necks have been turned by previous owner to 8.5 thou thick. This gives a loaded round diameter of .281 after sizing through a .281 bushing. Load used is 40g H4350 with 139 scenars at 2.840coal 10 thou off lands. All cases have just been annealed and had 5-6 firings estimated pressure from quickload 58k psi.
A clever gentleman from the other thread worked out why I'm getting soot on necks (zero neck tension and 5 thou of neck to chamber clearance. He suggested maybe trying a .279 bushing to give some more neck tension. I don't want to have to buy new lapua cases and neck turning gear as that is gunna set me back several hundred and my wife is already pissed I'm getting another gun Saturday. My main concern is if this soot and gas escaping is damaging the gun causing more erosion?? I have contacted Sinclair to see what attachment I need to clean my chamber as i already have their recoil lug cleaning tool. If the soot is not doing any damage I'm very happy with how the gun shoots and would be ok with simply cleaning the chamber to keep on top of the soot.
Can any experts help a mug out
Thanks
I shot some virgin Palma brass(sp) with a light load, -1.5 grns...soot to the shoulder and below, added 1.5 grns..all most no soot.Are you just shooting underpowered reloads..???
thanks guys going to try going up to around 41-42g estimated around 63kpsi and see what happens otherwise I'm going to order the Sinclair chamber cleaning tool and a 7mm bronze brush and just keep the chamber clean. thanks
I think this is wrong. SAAMI lists many factory cartridges running at high 65,000 PSI pressures, in factory actions.63 PSI is way excessive for a factory action
Load used is 40g H4350 with 139 scenars at 2.840coal 10 thou off lands.