30-221, 300 Fireball to 300 AAC BLACKOUT reamer

Discussion about rifles in 300 AAC BLACKOUT (7.62x35mm), hosted by the creator of the cartridge.

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300Blk
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30-221, 300 Fireball to 300 AAC BLACKOUT reamer

Post by 300Blk »

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.
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Re: 30-221, 300 Fireball to 300 AAC BLACKOUT reamer

Post by 300Blk »

http://www.ar15.com/forums/topic.html?b ... 1&t=516732
You can't just ream out an existing chamber. Doing so would alter the headspace which is something you can't fix as that would cause problems with the gas tube length.

All of which is moot cause the 300 Blk is the same thing as a 300 Whisper. The Blk is just a saami standardized 300 whisper
.

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 300 Whisper.

Comparing 300 AAC BLACKOUT to CIP 300 Whisper is like comparing 6.8 SPC-II to 6.8 SPC SAAMI, or like comparing 5.56mm NATO to 223. 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.
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Re: 30-221, 300 Fireball to 300 AAC BLACKOUT reamer

Post by L1A1Rocker »

silencertalk wrote: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.
I went to their site to see about price but cannot find it. Is it just not listed yet, and do you know what the price will be?
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Re: 30-221, 300 Fireball to 300 AAC BLACKOUT reamer

Post by 300Blk »

They did not list it yet. You can probably call them and place an order though. Someone could run a business just converted over guns for people.
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Re: 30-221, 300 Fireball to 300 AAC BLACKOUT reamer

Post by L1A1Rocker »

I've ordered a conversion reamer - was told, about three weeks as they are not in production yet. If all goes well I WILL be offering a conversion service for those that need/want it. I'm thinking about 50 bucks a rifle plus shipping, and tax for Texas customers.
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Re: 30-221, 300 Fireball to 300 AAC BLACKOUT reamer

Post by 300Blk »

You might want to charge extra for chrome lined barrels as a reamer may only last a few barrels.
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Re: 30-221, 300 Fireball to 300 AAC BLACKOUT reamer

Post by L1A1Rocker »

silencertalk wrote:You might want to charge extra for chrome lined barrels as a reamer may only last a few barrels.
Thanks for the heads up on that. I did not realize that chrome lined barrels were that tuff.
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Re: 30-221, 300 Fireball to 300 AAC BLACKOUT reamer

Post by 82nd airborne »

L1A1Rocker wrote:
silencertalk wrote:You might want to charge extra for chrome lined barrels as a reamer may only last a few barrels.
Thanks for the heads up on that. I did not realize that chrome lined barrels were that tuff.

They also have carbide reamers, which is what we use, as they require much less sharpening and are not as negatively affected by chrome lined barrels. Generally, carbide is alot more expensive, but PTG has a worthwhile price on them. I would highly suggest using carbide if it is more than a hobby.
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Re: 30-221, 300 Fireball to 300 AAC BLACKOUT reamer

Post by plamondacheq »

L1A1 Rocker

Are you still offering the reaming service I'm about to order a barrel from SI Defense And was wondering how much it would cost since I would only be sending the barrel not a complete upper.Any help with this would be great.
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Re: 30-221, 300 Fireball to 300 AAC BLACKOUT reamer

Post by goteron »

Can you convert a 300w to 300blk without a 300blk reamer, trying to explain the difference to the custom barrel makers right now and having some issues.

If so, how.

Doesn't look like bullberry will be onboard. MatchGradeMachine might be.
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