Conversion to 300 AAC BLACKOUT reamer
 

PTG is making a reamer which cuts the complete chamber except for the shoulder so it will not increase headspace. Generally, this will lengthen the throat and ensure the diameter is not too small.

This is the same idea as converting a 223 to 5.56mm chamber or a 6.8 SAAMI to 6.8 SPC-II chamber.

They will have a match one for bolt actions and one with a little more space for ARs to feed easier.

what is the blackout?

It is the version of 30-221 Fireball which has been submitted to SAAMI by Remington and AAC as the new standard.

www.300aacblackout.com

Remington is making ammo for it in large quantities and at good prices starting real soon now.

http://www.ar15.com/forums/topic.htm...f=121&t=516732

.

You can ream out an existing chamber. You can do it with a normal reamer being careful to not increase headspace, or you can do it with a special reamer as discussed in this thread. Further, 300 AAC BLACKOUT is not the same as CIP 300 Whisper(TM).

There is more freebore in 300 AAC BLACKOUT, which means if you load ammo to max pressure for each, you will get more velocity from 300 AAC BLACKOUT. It also means if you load ammo to be max pressure in 300 AAC BLACKOUT, and then shoot that ammo in 300 Whisper, you will likely have additional pressure.

do you know anyone with this conversion reamer,& any idea how much it should run for the touch up?

There is a guy on silencertalk who ordered one and said he would charge $50 plus shipping.

Got a link?

Thanks :smile: now instead of being able to sell them a barrel, I can compete for who rechambers whisper barrels most inexpen$ively! ...just what I needed, more tool inventory to help me make less money.Brilliant.