Alan, I have several BF's, one rifle, and 2 pistols, as well as a smattering of T/C's and encore's, both rifle and pistol. I use a brass muzzle guard that come's on Kleen-Bore rods, or if I'm using a Tetra rod, it comes with a delron muzzle guard.
I know that their designed for the other end, but they do a fairly decent job of keeping the rod straight as I push thru from the breech end. Gypayman