Sub-sonic .30s

[Builder45]

Does anybody have any experience shooting or hunting w/ calibers such as the .300 whisper or 30-221. I am trying to decide whether to get a wildcat or just use the .308 win for a suppressed rifle project.

I want a caliber that will effectively kill deer sized game but be able to do it sub-sonic. I am going to build this rifle strictly for a suppressor. Any replies are greatly appreciated. Thank you.

[Catfish]

The .300 Whisper is a .221 case necked up to .30 cal. so they are the same thing. I have a .25 cal. on the .221 case but never messed with sub-soinc loads with it. You do realize you need a class 3 license for the rifle your talking about building.

[Skinny Shooter]

Builder45, I've been interested in a subsonic 300 Whisper for some time now built on a Contender pistol.
Bullet placement will be important using a narrow 30cal projectile at slow speeds. So I'm thinking a bullet with a larger frontal area would be more effective. Like a 45 long colt loaded with a Hornady 350gr flatpoint or similiar weight bullet. That should have some shock value on a whitetail.
You may also need to have a scope with target knobs depending on how far you shoot due to the trajectory of a subsonic round.

http://www.quarterbore.com/300whisper/
http://www.lasc.us/RangingShotLongWhisper.htm
Since the AWB has ended, this has become more interesting: http://www.model1sales.com/item-detail.cfm?ID=UCE300&storeid=1&image=u16carpre3.gif

Allen

[HPBTMTCH]

The 300 wisper works pretty well, but the closer, the better. Make sure you get an 8 twist barrel so you can shoot the 240 seirra MK`s. The .308 works also, but imo, it is harder to find a sub-sonic load that shoots well. Another thing about building a sub-sonic load, use the bullets and primers called for in the load data, one time i had a bunch of 180 gr. barnes X bullets laying around and decided to load those instead my normal load of MK`s, the first round popped, made a hissing sound, and never made it out the barrel. Not good.

[polo]

No experience with those rounds but...did try squib loading '06 using half powder loads and some dacron for case filler, using .307 30-30 bullets gave good results on coyote with out blowing up the pelt.