I decided to clean the 510 AM yesterday as I was working in the shop. She had about 20 rounds through the bore ranging from 750 gr A-maxes at 2500 fps up to 835 gr Wildcats pushing 2800 fps.
Ran a butches bore shine soaked bronze brush down the bore for 5 strokes, resoaked and repeated another 5 strokes and then wiped out with a couple dry cotton patches.
Then soaked the bore with Tetras copper solvent for 15 minutes and when I pushed that out the barrel was spotless!!! I had to resoak with tetras and let it sit another 15 minutes just to make sure but it came out clear as it went in.
This may not sound all that impressive unless you are accustom to 50 BMGs and cleaning them. I am very impressed with the bore finish on this Lilja barrel, just as good as any smaller caliber Lilja I have used.
Here are a couple pairs of fireforming loads at 100 yards. I shot the one on the left and a friend from Canada shot the one on the right. This was the first two shots he had ever taken with a 50 cal. I think she will be a shooter!!