I modified my Omega breech plug, because i was interested in seeing if the modification would reduce blow back, not because the factory supplied breech plug didn't work. Thus far, i have fired around 75 shots through the modified plug. Right or wrong, i began to think the reliability was worse, the accuracy was worse, and the blow back was no better. I have had to abandon the modified breech plug in my Omega, because i had no faith in it. I am now shooting the unmodified factory Omega breech plug, and feel comfortable with it. I may try o-rings under the primer, and if they work, see how that goes. If they won't fit, i will use a C drill and increase the depth of the primer pocket some, so an o-ring will fit.

The muzzle end of the factory breech plug of the Accura is much different than the Omega breech plug. The Accura has worked quite well with BH209, but once in a great while it had hangfire, and once it had a fail to fire. The Accura breech plug with the vent liner installed, has been 100% reliable so far, and has been accurate, but the blow back hasn't been any better than the factory breech plug. The blow back in the Accura has always been less than the blow back in the Omega. I may give the o-ring a try in the Accura, or i may not; blow back in this rifle isn't much of an issue.

My early conclusions about installing vent liners in these breech plugs aren't really worth much, because i probably haven't shot more than a total of 250-400 shots total through these rifles. It does seem like i have gone through boxes and boxes of primers, and bullets, and several bottles of powder. I have come to have an opinion, even though there isn't really enough data to make strong, valid conclusions. To me it seems the modification of the Omega breech plug is unnecessary, but adding the vent liner to the Accura breech plug allows for a deeper powder chamber. This seems to be be more reliable than the factory breech plug design is, when using BH209.

I am also inclined to think using W209 primers may be more of the cause for the hang fire, and fail-to-fire in the Accura, than the breech plug. I am inclined to believe that Federal 209A primer used in the Accura might give 100% reliability, but this is just a thought. I am now using the 209A primer, because it makes me feel better.