Gunsmithing Barnes 70gr TSX copper fouling, how bad is it?

[Chicory01]

I've been reading reports of the extreme copper fouling caused by Barnes TSX bullets in rifles. Some people are claiming their groups expanding from 1 MOA to 4-6 MOA after 30 rounds.

There are some articles claiming Barnes has fixed this issue with the introduction of grooves within the bullet to ease fouling and lower the pressure. Does this provide any significant relief of copper fouling or is the difference minimal?

I plan on using the 70gr TSX in a KAC SR15 for self defense and hunting. I'm now unsure if these would be ideal for using mag after mag in a prolonged self defense situation.

Can anyone confirm just how bad these bullets depreciate accuracy after only 1-2 magazines?

Thanks in advance!

 

[hesp]

I have been using the TSX in my rifles since they came out. I see no more copper fouling from them than any other copper jacketed. bullet.

 

[glock63]

Non-issue.

 

[M4guru]

I’ve shot so much of this stuff I lost count a decade ago and never saw that issue.

 

[sgtsmmiii]

I have been using the TSX in my rifles since they came out. I see no more copper fouling from them than any other copper jacketed. bullet.

My experience, too.

 

[Chicory01]

Cool, thanks for the replies fellas.