Gm54-120

I think you have hit the nail right on the head...

The W209 works very well with the conversion and creates a lot less rock hard carbon in the flash channel. I do not even bother drilling the channel out anymore....

Some time when you are bored... load a primer then hold the muzzle off a concrete floor about 2" and shoot the primer. The Fed 209a and the CCI 209m will leave a really nice black round circle on the concrete - they put out a lot of debris. As you back down in primer strength - there is a noticeable difference...