I had a New Mini-30 Tactical that was lacking in the accuracy dept and it would load up with copper in a very short time. With handloads the best I could do was about 4-5 inch groups at 100 yards with optics. The first thing I did was have the trigger done. As this helps the shooter it does not help the firearm, so rifle accuracy is still the same. The next thing I did was bed the action. This has always helped with accuracy and IMO a must. In the case of this Tactical increased accuracy was minimal. Next was to tackle the rough bore and smooth it out. As I'm not one to spend hours or even days hand lapping a barrel I took the easy route. I ordered up a Tubb's Final Finish lapping kit in .308. It comes with 50 bullets, 10 each of 5 different grit size. I followed the directions and ran them through the bore. Copper fouling was reduced, but not by a whole lot. I think I may have gotten better results if I had used their .312 kit instead of the .308, duno. The end result was accuracy was improved and copper fouling was reduced some. In the future if I ever get another Mini, the first thing I would do would be, Trigger job, Bedding, Gas Block adjustment and of course Fire Lapping. This was a typical 100 yard target before lapping. This is how it ended at 100 yards after lapping.