I have read somewhere that inconsistent ignition will cause accuracy problems. This rifle is a military rifle originally, that was a basket case, and was re barreled, and chambered to 7mm rem mag. This was the rifle that proved to me that building them is not cheap. I bought a quite a nice inletted stock, ($300 US), after paying for the barrel, chambering, bluing, and the $90 I paid for the rifle. At the time I wanted the rifle to approximate a 280 Ross, with a modern cartridge. It has a Bausch and Lomb Elite 4000 scope, which should be ok, but I will try another. The barrel that I put on was a cheap Centurion barrel, and when I checked it , to my surprise it has an 11 inch twist. I had it working pretty will with 175 grain bullets, but this conversation started when I tried some 160 grain bullets. I loaded them up to slightly less than 3000 fps. and it would put two together, and the third may be as much as a foot high at 100 yards ( good for very long range). Getting the bolt back together was a bit tricky, as it did not want to go in the correct groove, I finally got it, and it is working better, this eve I will fire a primer to prove it, but I am sure it is hitting them much harder. I really like this rifle, and will do what is required to make it work.