A pressure problem solved

[muleman69]

My hunting partner bought a new Kimber Mt. ascent in a .280 Ackley improved and had high pressure problems with his reloads. It was a bit snug on closing and opening , First thing we did was check head space (which was fine) then went to adjusting dies and checking brass . Adjusted dies so brass fed well and made up some mild loads and fired , pressure signs good but still had a bit of a snug bolt lift. He goes home and makes up some rounds and tries it again, calls me from range and tells me bolt won't open and the two loads he shot read 4000+ on crony(WOW). He brings rile back and we find the brass he loaded was .008 over max. So I resize, trim and load again, everything good but sticky bolt??? (CRAP) I told him we need to take this to smith and scope the chamber which we did and found the chamber about as rough as the pavement in front of your house . Polished chamber up fired a few rounds and LIFE is GOOD . Goes to show you just don't get what you pay for,$1750 rifle turned out to be over $2000 plus a lot of frustration. I want to thank a great member of our forum for his exspetise and help walking us through this from the start, Mr. BOYD ALLEN

 

[muleman69]

Sorry about the long post ,just thought it might help someone down the road that has muiltple problems as we did ,being my friends dies, to long of brass then rough chamber

 

[ireload2]

Rough chambers do stink.
If really bad you will have difficult extraction with ordinary loads.
A stretchy rear locking action combined with a rough chamber produces poor extraction and poor case life with lots of opportunity for case head separations.

 

[Richard Coody]

i have used the flex-hone rifle chamber hone sucessfully. gently and a little.at a time.

 

[muleman69]

i have used the flex-hone rifle chamber hone sucessfully. gently and a little.at a time.

Were do you get your hones and what grit do you use?

 

[pirate ammo]

Kimbers are not as great as they like to think,,even the handguns,,this is from owner feedback

 

[muleman69]

Kimbers are not as great as they like to think,,even the handguns,,this is from owner feedback

I had an issue last year with there SOLO pistol. Sent it back but but it still did't work. Ended up selling it and losing money. Even they new it was a piece of crap as they discontinued it

 

[pirate ammo]

I had an issue last year with there SOLO pistol. Sent it back but but it still did't work. Ended up selling it and losing money. Even they new it was a piece of crap as they discontinued it

the way I understand it Kimber was great to start,,you had to be a master dealer to get them,leaves out people like me,then like so many others mass production takes over,quality goes
down and someone else takes over,,not good.you start to spread out to other things and got to much going..

 

[Richard Coody]

i got mine through grainger

these are for firearms

http://www.brushresearch.com/brushes.php?c2=183

but i used these. it was before the firearms ones were available. i just picked one with a slightly larger diameter than the chamber. i suggest the fine grit.

http://www.brushresearch.com/brushes.php?c1=1

 

[SSL]

An acquaintance of mine had a problem with a .300 WSM in a Kimber. After a couple shots, brass wouldn't eject until it cooled. He ended up sending it to a gunsmith in Texas who fixed it for a few bucks plus shipping. He said a screw extended a tiny bit into the chamber and caused sticking on cases that hadn't cooled enough to contract a bit. Not being familiar with Kimber design I can't speak for what screw this was or even if true.

 

[Dusty Stevens]

It is a mass produced rifle for a custom rifle price. Cant figure out how they do it.

 

[muleman69]

It is a mass produced rifle for a custom rifle price. Cant figure out how they do it.

I'm with you (how do they do it?) The concept and designs are great ,it is when they go off to the engineer and machinest along with quality control things go to crap