Hello I apologize for the length, but I wanted to be detailed.
I have a Rem 700P that is about 12 years old. I have ran it suppressed for the last year with a Thompson Machine 30Ti. Maybe 200-300 rounds over that time, 30-40rds per session. I always removed the suppressor after shooting. July of this year(2020) I decided to make a Form 1 suppressor that I could designate to the 700, and leave on all the time. After ATF approval in hand I did just that.
At that time I also switched from using Mobile 1 oil for coating the internals of the suppressor, to Accuracy Oil from Modern Spartan Systems. A few days ago (10/13/2020) I was looking at the end of the suppressor and saw brown build up. I took it apart and rust had formed inside several of the stainless steel baffles, there was also a strong ammonia odor. I immediately took it apart to find some pretty severe pitting that had already occurred on the baffles. I then put a camera down the bore of the barrel and discovered this horrific sight. Littered throughout the barrel starting at the crown and going back about 12-16" are 12-18 sites like this.
The last time I put a camera in bore was 6/14/2020, right before I put the suppressor on, and switched the oil product used for internals. I still have the pictures from that and was able to verify dates and condition.
I have not shot this since I observed the damage and can not say if the accuracy was effected on the 700. It has shot 0.50-0.75MOA its whole life, so I will take it out and see. Judging by the condition of the crown I am not optimistic that it will still shoot. The only cartridge this barrel has seen is Fed SMK 168g factory loads.
In addition to the above- I just purchased a 6.5Grendel Howa that I picked up Friday10/9/2020. I shot it on Monday 10/12/2020 40rds(Hornady Black 123g) breaking in barrel. I used my Thompson machine 30Ti suppressor, lubricated with the Modern Spartan Systems Accuracy Oil. I didn't take the suppressor off until later that night. 10/13/2020 the same day I discovered the rust on the 700 I also checked this barrel, and sure enough there were little brown burr piles that looked like rust. I Immediately put patches down it and a nylon brush to break it up and push it out. It would not come out so I fired five rounds then cleaned. After more patches and nylon brush this was what was left behind in several spots.
After tending to the barrel I checked the titanium mono-core baffle and I did not see any rust on there, however the stainless steel spacer did have surface rust showing.
My thought is that the 700 barrel started looking like the Howa, back in July, and progressively got worse over time until I recently discovered it.
My questions are :
Has anyone used the Modern Spartan Accuracy oil and experienced similar issues?
Does it seem like the oil is a likely source?
I am VERY frustrated, on my 700 I recently upgraded stock(Foundation), trigger(Huber), glass(Athlon ETR), to then discover a barrel that looks like the surface of the moon, which a few months ago looked smooth as glass.
I will be reaching out to Modern Spartan today to discuss with them.
Any feedback will be greatly appreciated.
I have a Rem 700P that is about 12 years old. I have ran it suppressed for the last year with a Thompson Machine 30Ti. Maybe 200-300 rounds over that time, 30-40rds per session. I always removed the suppressor after shooting. July of this year(2020) I decided to make a Form 1 suppressor that I could designate to the 700, and leave on all the time. After ATF approval in hand I did just that.
At that time I also switched from using Mobile 1 oil for coating the internals of the suppressor, to Accuracy Oil from Modern Spartan Systems. A few days ago (10/13/2020) I was looking at the end of the suppressor and saw brown build up. I took it apart and rust had formed inside several of the stainless steel baffles, there was also a strong ammonia odor. I immediately took it apart to find some pretty severe pitting that had already occurred on the baffles. I then put a camera down the bore of the barrel and discovered this horrific sight. Littered throughout the barrel starting at the crown and going back about 12-16" are 12-18 sites like this.
The last time I put a camera in bore was 6/14/2020, right before I put the suppressor on, and switched the oil product used for internals. I still have the pictures from that and was able to verify dates and condition.
I have not shot this since I observed the damage and can not say if the accuracy was effected on the 700. It has shot 0.50-0.75MOA its whole life, so I will take it out and see. Judging by the condition of the crown I am not optimistic that it will still shoot. The only cartridge this barrel has seen is Fed SMK 168g factory loads.
In addition to the above- I just purchased a 6.5Grendel Howa that I picked up Friday10/9/2020. I shot it on Monday 10/12/2020 40rds(Hornady Black 123g) breaking in barrel. I used my Thompson machine 30Ti suppressor, lubricated with the Modern Spartan Systems Accuracy Oil. I didn't take the suppressor off until later that night. 10/13/2020 the same day I discovered the rust on the 700 I also checked this barrel, and sure enough there were little brown burr piles that looked like rust. I Immediately put patches down it and a nylon brush to break it up and push it out. It would not come out so I fired five rounds then cleaned. After more patches and nylon brush this was what was left behind in several spots.
After tending to the barrel I checked the titanium mono-core baffle and I did not see any rust on there, however the stainless steel spacer did have surface rust showing.
My thought is that the 700 barrel started looking like the Howa, back in July, and progressively got worse over time until I recently discovered it.
My questions are :
Has anyone used the Modern Spartan Accuracy oil and experienced similar issues?
Does it seem like the oil is a likely source?
I am VERY frustrated, on my 700 I recently upgraded stock(Foundation), trigger(Huber), glass(Athlon ETR), to then discover a barrel that looks like the surface of the moon, which a few months ago looked smooth as glass.
I will be reaching out to Modern Spartan today to discuss with them.
Any feedback will be greatly appreciated.
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