If you don't periodically clean carbon out of the flash channel you will eventually get what you have described, a hang fire or something funky. I recommend cleaning the carbon out of it between every set of groups.

And I thought I was cleaning that bp good. So much for that idea. I must rethink my ML cleaning procedures.

Larry; if you have never used a drillbit on it before your in for a shock,that carbon can get very hard.i use the bits that come with a 1/4" HEX HEAD and drill by hand.i also made one from left over 3/8" dowel that i can use in my disc without removing the BP.have fun........karl

I was convinced it was a seating pressure problem until your last post on page one. If you have not been cleaning out the rear pocket of your breechplug with a drill bit, that is almost certainly your problem. You will be astounded at how much fouling you get out and how hard it is. You will also be surprised at how far up the breechplug the drillbit will go. I don't use a drill, just grab the drillbit with a pair of pliers and turn the breechblug by hand.

Everybody knows there is a learning curve with BH209, but using a drill bit in the channel has been well documented for 3 years now. The 350's will still be a much better choice than the 300's.

You have such a way with words my friend. You should see about a job in the state department and become a diplomat!

The new Vision plug has never been approved for BH209. I have had pretty good results but not for hunting that's for sure.

On February 1st this year - I got an email from "Gordy Edwards" at Knight Rifles - and he assured me that the breech plug - part # 900046 - for bare primers, is made specifically to solve any problems with shooting BH 209. He said, he has been shooting it for over 2 yrs. with great results.
I have a Knight Vision rifle and also the new bp - but due to the deep snow, our shooting range is closed and I have to wait till warmer weather to try it out. I like the extra weight and the way the Vision comes up so natural - it feels real good and I think I'm gonna like shooting it better than My TC Bone collector.
Ditto, on keeping that flash channel clean. I use a 1/8" drill bit - just in my fingers - every 20 shots or so at the range. It's a must.

Thanks guys for the info.

last year my vision was in and out of my truck for over 3wks with the same load.add some freezing rain and snow in the mix.i finally got a shot at a small buck. he did not approve of the breech plug either,in fact it broke his heart.but i sure do......karl