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Forum: 300 Whisper Rifles and Pistols

10-10-2011, 06:38 PM

Replies: 23

SBR cycling problems.

Views: 4,159

Posted By LouBoyd

A 220 grain bullet requires four times the energy...

A 220 grain bullet requires four times the energy to drive to 1000 fps as a 55 grain bullet. Caliber doesn't matter much. It also carries four times the energy when it leaves the muzzle. ...

Forum: 300 Whisper Rifles and Pistols

09-25-2011, 10:47 PM

Replies: 23

SBR cycling problems.

Views: 4,159

Posted By LouBoyd

It would take some pretty weird fluid dynamics to...

It would take some pretty weird fluid dynamics to get maximum flow with "only half of the barrel port exposed to the gas block port. If they're different sized being exactly concentric isn't...

Forum: 300 Whisper Rifles and Pistols

09-25-2011, 02:04 PM

Replies: 23

SBR cycling problems.

Views: 4,159

Posted By LouBoyd

The way I align gas blocks is to plug the chamber...

The way I align gas blocks is to plug the chamber and blow air into the muzzle. Just listen to the air flow coming out of the gas tube while moving the block to find the position with maximum...

Forum: 300 Whisper Rifles and Pistols

09-24-2011, 11:31 AM

Replies: 23

SBR cycling problems.

Views: 4,159

Posted By LouBoyd

Just to clarify, are you using a rifle or carbine...

Just to clarify, are you using a rifle or carbine length receiver extension tube? Are you using the correct standard spring? What was your logic for reducing the buffer assembly weight? Have...

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