I used boretech carbon cleaner a foaming bore cleaner that was awesome clr and finished it off with jb bore past and now a regular patch of the boretech it’s flawless il never let it happen again theor bloody stubborn to remove
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I used boretech carbon cleaner a foaming bore cleaner that was awesome clr and finished it off with jb bore past and now a regular patch of the boretech it’s flawless il never let it happen again theor bloody stubborn to remove
To me it looks like...
On the left side of the 'line' is the transition into the barrel (a bit further down would show the lands) on the right of the line is the chamber.
The line is the build up of carbon ahead of where the case finishes. It may be deep enough that now the projectiles get scratched, depending on their shape.
Left side is chamber and right side is barrel.Quote:
Originally Posted by johnd
Definitely a carbon ring there. CLR on a nylon brush spun in the drill on the end of a cleaning rod will sort it asap. Just remember to thoroughly clean the CLR out with meths or alcohol. Then oil straight after, then a final dry patch.
Dry the chamber and barrel of CLR before rechecking with the borescope to check progress and then clean out CLR with meths etc.
Ha! Oh yeah, my bad. Anywho that's ya carbon ring.
How you dissolve it/ remove it is up to you, read up on what chemicals work with your barrel steel.
And how they can react to the outer coatings as well.
Now that the OP has a borescope the actual chambered case length can be viewed.Quote:
Originally Posted by grandpamac
Take a fired empty case, chamber it and close the bolt. Then, from the muzzle insert the Borescope and run it along until meeting the chamber / throat junction. You will be able to see if the case sits hard against that 90 degree shoulder separating the chamber and throat or whether there is clearance between the case throat and the shoulder. If there is contact it's definitely time for case trimming.
Try several cases this way to check possible variability in case lengths as some may make contact and others may not.
My comment on Carbon Rings. Periodically I scrub them out too. Usually with KG12, a good abrasive for this. I know the rings can affect accuracy so I don't ignore them but over several rifles I don't believe I've ever noticed an obvious accuracy detriment even after the rings have been in place for some time. So, I don't know at what point it matters but my practise of cleaning them out once or twice per year seems OK to me. That would be around every 200 to 400 - 500 rounds approx.
Mystery solved round two. Damage to throat/freebore.
Hi team, I just got the borescope so when in motion things seemed clear to me but I can see how the static pics can be confusing. Ran a bit more tests and tried to get the screen cuts in focus, so hopefully this helps.
Photo 1, borescope without mirror, the circled part is where the deformation is.
Attachment 255951
Photo 2, borescope with mirror, center of mirror is how the damage looks like from another angle.
Attachment 255952
Photo 3, borescope without mirror. Jammed a round in there, can see the copper jacket scraped and left on there. explains the tight chamber close and loss of accuracy.
Attachment 255953
Photo 4, borescope with mirror. The copper jacket looks really obvious in this one.
Attachment 255954
I've really tried cleaning but it was at best clean the scraped copper jacketed, I do believe this is a gun smith job now if not buying a new barrelled action job :P
Still thanks a ton for the support and knowledge from the team. Learnt lots and lots, keep all that wisdom and experience flowing please!
Turn it into a 6 mm ARC mate. Just a new barrel.
One day I will mate, but I'm not done with the Grendel yet :PQuote:
Originally Posted by DeonK
We should go shooting together sometimes, lemme know when you're free :D
A light ream might do it
any ideas on what might have caused that burr?
From experience - Cleaning rod or something else stuck down the chamber te remove a stuck case.
Blip is right, a light ream should fix it. Reach out if you cant manage loclally.
Honest no clue aye, could have been improper cleaning.Quote:
Originally Posted by STC
Will try to find local first, will definitely sing out if I haven't got any luck.Quote:
Originally Posted by Jaco Goosen
Just as well I didn't have cleaning rod the other day then....bit of #8 wire that had broken on nearby fence was straight enough to pop out problem case.... Shit I'm a hori lolQuote:
Originally Posted by Jaco Goosen
@Micky Duck
Just wanted to advise I replied yesterday to your PM.
Apologies for imposing this on the thread. My only option to communicate this to MD.
Oh that will be really good for the barrel.....Quote:
Originally Posted by Micky Duck
Sent from my SM-S916B using Tapatalk
I know I know....but a howa stainless steel barrel will be shit loads harder than old semi rusty #8 and needs must and all that,it was very straight and slid through easily. I shouldve known better...hot loads and barrel was getting warm,case jammed and tiny extractor just popped back over it each time,case popped out no trouble with light push from inside it. but them wallabies just kept sitting there tempting me to try again....bastards.Quote:
Originally Posted by BRADS
MIcky Ill have to come over to check your roo guns barrel.
I might just bring something along to defend myself against those zombi roo's you know.
The rusty wire aint as bad an idea as the two fellas that shot a 22RF down a Lee Enfield to get a stuck case out.
Aye aye capt, do tell more?Quote:
Originally Posted by Jaco Goosen
Some years ago I were hunting in a very dry and very dusty area in Africa. Dont know how or when but at some stage the farm owner and his mate started fiddling with a old No4 Mk2. Upon closer inspection I found a case had gotten stuck and would not budge.
Told then to let it go, everyone can shoot my 243 Win, it seems to kill real good - and got busy gutting the last 10 or so animals we had harvested.
Heard a shot and was kinda annoyed as who the hell fires a rifle this close to us without even warning.
Yup....you guessed it. These two fellas had managed to get the 303 case out.....by shooting a 22 down the 303s barrel.
Im happy to report I'm safe - I survived another 8 years of hunting with these two good buggers. (The 303 in question's career ended some 3 years later when the barrel were washed out.)
