Post by: Lokaybinnity on May 26, 2021, 08:18:06 AM
Post by: 7mmfan on May 26, 2021, 08:24:20 AM
Post by: Angry Perch on May 26, 2021, 08:33:52 AM
Post by: Wanttohuntmore on May 26, 2021, 08:42:37 AM
Post by: Igor on May 26, 2021, 08:56:16 AM
Have you ever done a thorough copper fouling removal? I have a 7 mag that is similar age and was always a fantastic shooter. Last year it went in the toilet for no apparent reason. I had never done a copper fouling removal. I did a very thorough scrub and it brought the accuracy right back.
Had the same issue with my Winchester Model 70 Featherweight......the groups just gradually got bigger over the years with the same ammo. Cleaned it every year, which did nothing to remove the copper fouling. Once I removed the copper fouling the groups tightened right back up.
Post by: rainshadow1 on May 26, 2021, 09:03:57 AM
Post by: thinkingman on May 26, 2021, 09:24:03 AM
By "checked the scope and rings", I assume just checked to see if tight? If you have a spare scope around, you could throw it on and quickly eliminate that as a problem if a good cleaning doesn't solve it.As soon as I read the thread, I was guessing Leupold.
The scope would be my first thought for groups growing but copper fouling or a ding in the crown would be my second.
Start with cleaning the bore.
Post by: Angry Perch on May 26, 2021, 10:00:25 AM
By "checked the scope and rings", I assume just checked to see if tight? If you have a spare scope around, you could throw it on and quickly eliminate that as a problem if a good cleaning doesn't solve it.As soon as I read the thread, I was guessing Leupold.
The scope would be my first thought for groups growing but copper fouling or a ding in the crown would be my second.
Start with cleaning the bore.
Let me guess. Leupolds are junk?
Post by: Bill W on May 26, 2021, 11:01:55 AM
Post by: Karl Blanchard on May 26, 2021, 11:44:31 AM
Post by: Lokaybinnity on May 27, 2021, 06:22:10 AM
Post by: headshot5 on May 27, 2021, 06:46:37 AM
Post by: Bill W on May 27, 2021, 07:10:01 AM
Post by: BULLBLASTER on May 27, 2021, 07:58:45 AM
Post by: Igor on May 27, 2021, 08:39:43 AM
thanks for the answers i think im going to start with the copper fouling. how do i go about doing that. do i just scrub the crap out of it with a brush or is there a cleaner other than hoppes, or is hoppes what i use, and just let is set longer in the barrell before the dry patch.
I use Barnes CR-10. It is amazing how well it works at removing copper-fouling, but you need to be very religious about following the instructions regarding its use. I also clean the bore with Hoppes #9 afterwards to make sure none of the Barnes remains. The Barnes contains ammonia which should be removed completely. The final step should be running a patch through the bore and applying a light coating of a good gun oil.
Post by: 7mmfan on May 27, 2021, 09:10:08 AM
I use the Boretech stuff. They're instructions are easy to follow, and it worked well. Have lots of patches on hand, and a vinyl bore brush. A gun vice or some way to secure your rifle so you can just run patches through without handling the rifle is highly suggested.
https://www.boretech.com/categories/gun-cleaners/bore-cleaners (https://www.boretech.com/categories/gun-cleaners/bore-cleaners)
Post by: Lokaybinnity on May 27, 2021, 09:14:25 AM
Post by: Karl Blanchard on May 27, 2021, 09:20:01 AM
Post by: b23 on May 27, 2021, 10:06:54 AM
They'll give you a good view of how it looks on the inside and how clean you're actually getting things. Often we think these things are perfectly clean and down to bare metal but you run a borescope in there to find out ohhh not so much. A borescope can help identify other issues like throat erosion, carbon rings, and tooling marks.
Maybe not something most people will use all that much but with the Teslong borescope not only being as affordable as they are but also producing a very good image quality they're a useful tool to have and can help take the guess work out of things but like I said don't be surprised if the first time you use one your reaction is :yike: when looking at factory barrels for the first time that's a pretty standard response.
Post by: Stein on May 27, 2021, 10:54:23 AM
There are numerous copper removal products out there. The one consistent feature of all of them, especially if you've never done it, is that it will take time, and multiple treatments probably. I did 3 full copper removal treatments on my 7 mag before my patches came out clean. That's what 20 years of shooting will accumulate in there.
I use the Boretech stuff. They're instructions are easy to follow, and it worked well. Have lots of patches on hand, and a vinyl bore brush. A gun vice or some way to secure your rifle so you can just run patches through without handling the rifle is highly suggested.
https://www.boretech.com/categories/gun-cleaners/bore-cleaners (https://www.boretech.com/categories/gun-cleaners/bore-cleaners)
Ventilation and nitrile gloves too, copper remover is some pretty nasty smelling stuff. I've used several different kinds and they all seem to work about the same. Apply, sit, scrub, apply, sit, scrub just like 7mm said.
Post by: Magnum_Willys on May 27, 2021, 01:02:49 PM
don't be surprised if the first time you use one your reaction is :yike: when looking at factory barrels for the first time that's a pretty standard response.
I have a 40 year old vanguard 300 win mag that the inside of the barrel looks like the inside of an old sewer pipe thru the teslong but it will shoot 3" groups at 500 yards with factory 215 bergers. go figure ?
Post by: b23 on May 27, 2021, 03:12:23 PM
Oh I know what you mean. I kept the barrel off of my Rem 700 VSSF 223 it looks beyond terrible and is laughable it's so bad but that thing would sit and stack up 40gr Nosler BT pushed by Benchmark until you were bored pulling the trigger when I pulled the barrel and turned it into to something else. It was still shooting so well I figured I could get a few bucks for the barrel but once I borescoped it and saw how bad it was that was the end of that idea.don't be surprised if the first time you use one your reaction is :yike: when looking at factory barrels for the first time that's a pretty standard response.
I have a 40 year old vanguard 300 win mag that the inside of the barrel looks like the inside of an old sewer pipe thru the teslong but it will shoot 3" groups at 500 yards with factory 215 bergers. go figure ?
Post by: jasnt on May 27, 2021, 09:02:25 PM
Post by: 2labs on June 28, 2021, 04:55:54 PM
24yo? Wood stock? Check the barrel contact with the stock. Wood moves over the years. May need to float it.
This,, one of my favorite rifles model 70 carbine..243. Wood stock. Wouldn't group.
Dollar bill test and then a deep socket wrapped in sand paper fixed it! Remember to refinish/ seal any raw wood.