I have also researched this round and had a chance to get the skinny on the chamber specs... It is basically the 300-221 Fireball and will most likely shoot in a 300-221 Fireball chamber. BUT, not all 300-221 Fireball chambers are the same. If your chamber will not shoot the Blackout you probably will be able to touch it up with a Blackout reamer and be good to go.
As some of you may well know, I have put a few 300-221 Fireball rounds downrange (~10000) and even built a few (about eight or so). I think that going with a carbine length gas system in the 16-inch barrel pretty much optimizes the 16-inch barrel for super sonic loads. That is not to say that it will not shoot subsonic loads but it will not be as flexible with bullet weights and powder types in the subsonic mode as a gun set up with a pistol length position.
Non the less, I hope that this cartridge is successful.
320pf
Quote:
Originally Posted by Expatriot
I looked into these OAL's and while I think there is some merit here, this is not without controversy. These OAL's are VERY short for most bullets. While this may help them feed through an AR15 magazine more reliably they leave quite a large jump to the lands.
In my 300-221 chamber most bullets would be left with a .130" to .220" jump to the lands. That is an awfully long way for a bullet to travel before encountering rifling which is likely to impact on accuracy.
Also keep in mind that seating bullets this deep is going to change the pressure and velocity in your current load.
I will leave final decision on this till I have a chance to actually try it.
+1
PS how does everyone on this board like knowing that the certain person who "developed" the "new" round spent time trolling this board for info like case lengths, bullet choices, powder selection and loads? Then low and behold commercial ammo of nearly the same type shows up and someone else is making money from your ideas and work.  |
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