Originally Posted By: SoTexDoes anybody know if the Rem. 700 black out bolt is configured the same as the 700 fireball bolt...and possibly the mag box/follower. I know the 700 FB bolts have the ejector/extractor "clocked" different from the std. 700 223 bolt as to deal with feeding issues with the short cased fb. I would assume the 300 blk out 700 is set up like the FB 700 but would like to hear it from someone that has verified it
Thanks
jeff
Jeff...
Here's the cause of the problem.
With the standard 223 bolt, as the case is withdrawn, as soon as the mouth clears the chamber, the ejector spring starts to push the case to the right.
With the 223, the bolt has to go back a ways, and then when it clears the chamber, the mouth is pushed into the right hand bolt recess cut, so the case is now at an angle. As the bolt comes further back, the mouth gets to the ejection port, and the case is flipped out.
All is good.
With the Fireball, and the same .223 bolt... as the Fireball case clears the chamber, the mouth is pushed into the bolt lug recess, but because the Fireball case is sooooo short, the case is over at a much sharper angle... so much so, that the left side of the case head is clear of the bolt face recess, and can drop out of the bolt and just "Faw down!!"... and lie there on top of the next round or magazine follower
Remington's solution was to change the angle of the ejector and extractor, so that when the Fireball case clears the chamber, it is pushed up at a higher angle, so the case mouth cannot slid into the bolt lug recess, and so the angle it formes with the bolt face is not as sharp, and the case head cannot slip out of the bolt face recess until the case clears the ejection port...
And it works fine.
I would not build a 300 BLK on a standard .223 bolt face for this reason.