Washboarding the barrel metal in one or various degrees. I don't think I've actually seen it or at at least never noticed it. So I'm not so sure it's relevent to todays guns and steels. Though for thin walled S&S's maybe so.
On many a gun that has had the barrels reamed I have clearly seen what might be described as washboarding. I don't notice any difference in felt recoil or fps from my loads compared to other guns without washboarding.
I am wondering show important is a gas seal when using fibre wads? I have never used them and always use a lubed fibre wad. I know my fps are always around 1200 fps but no idea what they might be using a gas seal. I also note that I have never been able to pick up an intact fibre wad after firing a load. They are usually split in many pieces or disintegrated.
