Hi Tim,
I'm not certain if they'll fill the bore with those barrels having somewhat aggressive rifling, but with the various MI barrels that are so popular these days, I'm nearly certain they do. I base this on how easily the cleaning rod turns when a bore gets so fouled that patches and brushes don't turn the rod.
I don't know about anyone else, but I've been surprised over the years how often a cleaning rod won't rotate and it happens even with very popular and accepted methods of cleaning the bore.
I never push or pull a cleaning rod thru a barrel without having marks on it that easily show it rotating and I "always" pay attention. If the rod doesn't rotate with whatever cleaning method is preferred, you absolutely need to investigate why.
Sometimes it's the rod's fault and sometimes it's the patch size and/or jag diameter that causes the problem, but you can't clean a bore properly when the tools you're using slide across the rifling instead of following it.
I know I'm being "Mr Obvious" but I suspect there are a great many shooters who don't pay attention to rod rotation and might just possibly benefit from the knowledge....or not! LOL
On multiple occasions I've had barrels quit shooting (Mostly Shilen Octagons) and I've brought them back to life with the felt pellets/Kroil/JB the length of the bore.
I wish I could say it works every time, but that's not the case.
Landy
