300 Fireball can make a nice hole

[stevejobs]

http://www.youtube.com/watch?v=Wa3V5tZXT7U&NR=1

I only mention it because a supersonic 300 Blackout should do the same thing.

[300Blk]

110 V-MAX

[stevejobs]

He says it's chambered 300 whisper (second comment down). Would AAC BLK supers be similar?

[300Blk]

RUAG 300 Whisper(R) ammo works in 300 AAC BLACKOUT uppers.

[stevejobs]

Cool!

[goteron]

I love all the "nice shot" comments. It was 14 yards! He could have just aimed down the rail. Though the mechanical offset on that scope was pretty killer.

[doubloon]

RUAG 300 Whisper(R) ammo works in 300 AAC BLACKOUT uppers.

I'm very intrigued by the BLACKOUT project and I've seen this statement several times in different places now and I have a question that may have been answered somewhere else but I can't find the answer.

I'm not a gunsmith and I don't handload so I have zilch of my own knowledge to draw on.

Correct me if I'm wrong but based on what I can find the RAUG 300 Whisper® case is 1-2mm shorter than the BLACKOUT case which makes me ask the following questions.

Why does this 1-2mm difference not cause a problem when loading Whisper® in a BLACKOUT chamber? How much of a case length difference does it take to matter and begin causing problems?

[300Blk]

There are two things to consider. One is the headspace. That is at most 0.0004" apart.

Then there is case-mouth interference to look at. There is none.

The RUAG case can be up to about 0.15mm / 0.006" longer than the 300 AAC BLACKOUT. There is still about 0.004" room in the 300 AAC BLACKOUT chamber - even if the RUAG was at the very max length.

[doubloon]

Good to know, thanks for the info Robert.

The problems from a shorter case in a longer chamber seemed a bit more obvious and somewhat benign to me, ejection problems, light primer strikes.

Aside from unsupported case ka-booms from extreme differences I couldn't think of any issues with a marginally longer case.

[300Blk]

The case does not headspace on the case mouth so it would have no effect on primer strikes. You are thinking of 40 S&W.