Breechplug, about a year ago you started a long thread with a question that went something like, "what makes a perfect breech plug' or some such thing. That thread was very fun and interesting to me, and has led to quite a lot of fun for me in the days, weeks, and months since. I have learned so very very much, because of that thread.
The Omega breech plug is about as good as it gets. I won't write that is perfect, but it is near; perhaps i should. It works with every available powder.
The Accura breech plug works for you, because of your powder choice. I think it is a good enough plug, and i believe you do too. The only powder i have ever used in my Accura is black horn. Every now and again i experienced a hang fire. This led me to get involved in the thread you started, and this led me to making a home made Accura plug that is better than the Omega plug. The reason i write that this Accura plug is better than the Omega plug, is because i can make it fit each primer to my rifle perfectly, and to date have never experienced a hang fire using black horn. It has only seen single digit temperatures yet, but later this winter, it will experience sub-zero temperatures.
Now we have the QRBP. I have fired the QRBP about 50 shots now. As with the Accura, the only powder i have used in the V2, is black horn. This plug amazes me. CVA told me that each plug is 'fitted' to one rifle. The plug comes with a tool, and using the tool, one 'marries' the plug to the barrel. This has resulted in zero blow by past the threads in my rifle. The first time i used it, i used nothing on the threads. No teflon, no grease, nothing. Fifteen shots later, i removed the plug with my fingers, and it felt like it was easier to remove, than it was to install. There may have been a tiny amount of soot on the threads. Then i shot it about 25 more times, with nothing on the threads. It removes so easily with fingers, that it almost causes me to have a thrill. Today, i shot it 10 times, and i had to force myself to keep my hands away from the breech plug, and remove it. To me, the way the QRBP works, is remarkable.
Is the QRBP the elusive perfect plug? Absolutely not!!! The first time i actually saw one with my own eyes, i couldn't hardly believe what i saw. I was shocked beyond words. The powder end of the QRBP is virtually flat! Flat! CVA, after black horn was out for years, made no effort whatsoever to design a plug that would work with black horn. Spending all the time we spent on that thread you started, told me CVA had made quite an error.
I didn't even try the QRBP, because of my previous experience with the Accura, Omega, and that thread about breech plug. The first thing i did was create a powder pocket like the Omega breech plug, and install a vent liner. This past week, with single digit temperatures was a good test for this 'fixed' QRBP. Left overnight in the truck through the bitter cold, loaded with black horn, and dirty, the V2 never failed to fire.
Making the 2010 CVA compatible with
all powders would have been so very very simple. The QRBP could have been the 'perfect' breech plug, alas CVA dropped the ball.