Not really. Both QRBP made for using Blackhorn, have short short channels. They have innards that are virtually direct copies of the short Encore/Omega breech plug. In other words, the Encore/Omega plug, and both of the Blackhorn QRBP, are mostly identical.

All three of these plugs have 1/8" channel. All three have near the same length channel. The QRBP do have a slightly larger flash hole. The slightly larger flash hole should actually improve Blackhorn ignition.

NOW, MY OPINION:

Each of these three plugs would be improved by increasing the diameter of the flame channel to 5/32". This step will reduce the pressure on the face of the primer, but will not affect the powder ignition. The QRBP could have a longer flame channel; if done correctly, this would increase the volume of the channel, and this would reduce the pressure on the primer. The QRBP would be improved by increasing the length, and the diameter of the channel.