I purchased a .223 ultra Handi-rifle a few months ago. I have shot over 7 different loads/brands with it. I can get 1 inch groups at 100 yards with it using Black hills 52gr. match loads with it, however, after about 15 shots, my accuracy goes bad due to a fouled barrel. Once I clean it, the first fouling shot is about 8 inches from the bullseye and it requires about 12 shots to get it good back to my original 1 inch groups. It does this with about all the loads/brands I have tried. 45gr., 75 gr, 55gr., just to list a few. I polished the bore and even had a gunsmith look at it. He exclaimed that the throat is alittle long and may be misaligned by a small margin based on his inspection with a borescope and seeing where the copper is collecting at the throat area. I sent the whole gun back to H&R and all they did was recrown it and showed me they could hit 1.5 inch group at 100 yards using remington 55gr. SPS with 5 rounds. I went to the range and I am getting the same results as described above. The bore is spotless after shooting but the throat area is full of copper. Should I send it back again? I wrote in a letter to them in the gun box and told them the gunsmith's report. They did not replace the barrel but just recrown it. I pondered shooting some firerlaping rounds thru the gun to smooth out the throat, but my gunsmith said it it's misaligned, this would not make a change in accuracy. I have fired about 100 rounds thru this gun and seems like my wallet is getting thin over buying ammo to test it and get it right. I also tried 2 different scopes to rule out error but each got the same results. I even tried a lead sled to rule out human error but with the same results. I even offered H&R in the letter to replace the barrel with a bull nonfluted barrel if no fluted barrels were available. Your thoughts?