Some will and some won't. I have a Browning A-Bolt whgich keeps all shots in pretty much the same group but I have owned rifles that put the first shot from a clean barrel in a slightly different spot. I always go hunting with the notion that the first shot from a clean barrel will most likely be the one that counts so take it to the range and clean beween shots so that you know for sure what your gun will do. Every gun is different and trying it under those conditions is the only way you will know.