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Forum: 300 Whisper Ammo and Reloading

08-27-2010, 11:07 PM

Replies: 9

Any Subsonic loads for a 200gr SMK?

Views: 2,317

Posted By Expatriot

I chrono'd 9.2gr of H4227 at 846 fps. This load...

I chrono'd 9.2gr of H4227 at 846 fps. This load fills the case roughly 65% and cycles my 10" Whisper reliably. I plan to try 10.0gr to see what velocity that gives me.

9.9gr of W296 gave 983 fps...

Forum: 300 Whisper Ammo and Reloading

08-11-2010, 05:34 PM

Replies: 9

Any Subsonic loads for a 200gr SMK?

Views: 2,317

Posted By Expatriot

I have settled on W296 as the best powder with...

I have settled on W296 as the best powder with H4227 as a backup. These powders seem to be the most reliable with a wide operating range.

Forum: 300 Whisper Ammo and Reloading

07-21-2010, 02:16 AM

Replies: 9

Any Subsonic loads for a 200gr SMK?

Views: 2,317

Posted By Expatriot

Ive been playing with H4227 and H322 for 200gr...

Ive been playing with H4227 and H322 for 200gr subsonics and both work really well as they cycle an AR reliably.

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