The bullet guiding muzzle on the CVA's I have work well and have no adverse affect on accuracy that I have noticed. I can shoot most anything out of them, some better than others but that is normal. Mine tend to like heavier conicals, mid weight sabot's, even patched round ball with the right patch and powder load. I also don't like to shoot a lot of premium bullets due to the price. I'm not saying I never shoot them, I like to experiment, but I get as good of accuracy with a wide variety of bullets so I see no need to spend $1+ on bullets. I usually try to catch them on sale when I want to try them out. I do shoot my MLer more than my CF's so price becomes a factor. I also mould some of the bullets I shoot to save money and get some personal satisfaction from the process.