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Forum: 300 Whisper Rifles and Pistols

12-15-2009, 04:53 PM

Replies: 21

Blowback 300 project.

Views: 4,134

Posted By cav_scout_tj

When forming 300W brass from .223 brass, the...

When forming 300W brass from .223 brass, the shoulder needs to be fireformed, and blown out a little. Shooting subsonics does not generate enough pressure to do this, have to use more powder. As...

Forum: 300 Whisper Rifles and Pistols

12-14-2009, 10:41 PM

Replies: 21

Blowback 300 project.

Views: 4,134

Posted By cav_scout_tj

Thats silly, the 357 sig and 400 Corbon are...

Thats silly, the 357 sig and 400 Corbon are bottle neck pistol rounds. They run fine blow back.

The AR57 uppers are blowback, and the 5.7 round is a higher pressure bottleneck round.

Forum: 300 Whisper Rifles and Pistols

11-11-2009, 02:01 PM

Replies: 21

Blowback 300 project.

Views: 4,134

Posted By cav_scout_tj

Actually, thats sort of a misnomer, since yes the...

Actually, thats sort of a misnomer, since yes the ejector can be fixed, but its part of a mag block like in the first pic. Those come in several flavors, some pop in from the bottom of the magwell,...

Forum: 300 Whisper Rifles and Pistols

11-10-2009, 08:30 PM

Replies: 21

Blowback 300 project.

Views: 4,134

Posted By cav_scout_tj

All sorts of 9mm info: ...

All sorts of 9mm info:
http://thegunwiki.com/Gunwiki/AnalysisAR9mmRRA

A lot of uppers use an ejector on the mag block ...

Forum: 300 Whisper Rifles and Pistols

11-10-2009, 09:59 AM

Replies: 21

Blowback 300 project.

Views: 4,134

Posted By cav_scout_tj

Use 9mm ejector parts, they should work. ...

Use 9mm ejector parts, they should work.

Blow back is louder than DI. This just doesn't pass the "cost / benefit analysis" test.

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