I want to build a Whisper gun need a few ideas

[Carbonman]

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carbonman

do you know what the parent case is?

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Starline 10mm Magnum case is the parent of the Spectre.

This is a proprietary cartridge, however, the licensing for small scale production is pretty painless.

[Shawn Carlock]

The 338 Whispers I have done or been around have easly shot sub MOA out to 200 yards. Email me direct about price and timeline. Also there are afew additional items you need for them in terms of equipment.

[bigrich954rr]

so with the 338 whisper i would use the 308 bolt face.what parent case would i start with i was looking at cutting down the rem 7mm case
how loud would it be with out a can? I know how i want the rifle built but still not sure on the round or where to get everything i need

[1doug]

I would get with shawn and have him do it. he has the reamer on hand and can give you load data to get started .

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so with the 338 whisper i would use the 308 bolt face.what parent case would i start with i was looking at cutting down the rem 7mm case
how loud would it be with out a can? I know how i want the rifle built but still not sure on the round or where to get everything i need

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it would depend on which reamer your smith has. the 338 wisper is based on the 221 fireball as well as the 7mm br remington brass

the only things you gain without a can and subsonic ammo is no sonic boom(crack)and no worry about transitioning thru the transonic zone.

from http://www.sskindustries.com/cartridges.htm

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One Whisper® series from 6 mm, 6.5 mm, 7mm, 300 and 338 is based on the 221 fireball case. Another series is based on the 7 BR case in 338, 375 and 416 caliber to convert 308 case head size actions.

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hope this helps.

oh and for cutting down 7mm rem brass you would have a lot more expenses with custom forming dies and reloading dies as well as a special order reamer.

[Shawn Carlock]

I like the 338 Whisper based on the 7 BR round, it is a fairly simple multi neck expansion process to make brass. OAL's run about the same as a 308 with the 300 SMK and they work well with the HS box mag assy. Running sub ammo with a tight action lockup, the loudest thing you hear is the bullet impacting the target.

[Black Diamond 408]

Shawn C.

This has gotton me interested! I am so use to the big boom, it would be nice to just hear a pop now and again.
What kind of chamber pressure do they have?

Thanks,
Dave

[Shawn Carlock]

The sub sonic ammo out of the 10-12" internal barrel runs about 40,000 or so. You can run up to around 53-55,000 for full power, but who would if you want more power I'm sure you have big power tools around. They are quite alot of fun and really good for various pest control problems.