Suppressors 300 Blackout and 308 bolt action suppressed

[SABuzzard]

Has anybody run a suppressed, subsonic 300 AAC Blackout bolt action side-by-side to a suppressed, subsonic 308 Win bolt action?

I have a 308 bolt gun that I run a can and subsonic ammo through and a 300 AAC Blackout SBR AR w/ can but it's not exactly comparing apples to apples.

I'm wondering if the smaller case volume of the 300 would make for a quieter delivery. Heck, after all the bullet doesn't care if it was brought up to speed by a 300 Blackout, 308 or a 300 win mag.

 

[PLeighton]

Re: 300 Blackout and 308 bolt action suppressed

The smaller case volume of the 300 BLK makes the velocity much more consistent.
This also allow you to run fast powders that typically net more quite sub loads.

 

[Alabama556]

Re: 300 Blackout and 308 bolt action suppressed

I have with bolt guns and the sound was roughly the same. The difference is the whisper was shooting a 220 grain bullet and the 308 was only shooting a 165.

 

[Yasherka]

Re: 300 Blackout and 308 bolt action suppressed

There really is no comparison. I don't have the equipment to measure the report, but the Blackout is dead quiet. With the .308 you have a much louder report as well as the supersonic crack. The difference is the 9.5 grains of H110 vs. 43 grains of Varget. I have a 16" barreled Howa for the AAC platform and a 20" SPS for the .308. The can is a Gemtech HVT-QD and I run it on both rifles.

Edit: Sorry, I didn't read your post closely enough to realize what you were asking...mea culpa

 

[bribri]

Re: 300 Blackout and 308 bolt action suppressed

I have the both calibers in bolt guns as well, just hearing them I can't tell a difference and thats with the 208 amax in both calibers.

 

[Buckeye308]

Re: 300 Blackout and 308 bolt action suppressed

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bribri</div><div class="ubbcode-body">I have the both calibers in bolt guns as well, just hearing them I can't tell a difference and thats with the 208 amax in both calibers.</div></div>

This is what I have noticed.

 

[SABuzzard]

Re: 300 Blackout and 308 bolt action suppressed

Thanks guys for the feedback. Think that saves me from putting together a blackout bolt gun. I'm sure I'll develop an itch for something else soon though.

 

[malaga2]

Re: 300 Blackout and 308 bolt action suppressed

The blackout bolt would allow for much heavier bullets...Ive used 240's and 250's in my Whisper without issue...no difference in sound to my supressed 308's

 

[raider1v1]

Re: 300 Blackout and 308 bolt action suppressed

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bribri</div><div class="ubbcode-body">I have the both calibers in bolt guns as well, just hearing them I can't tell a difference and thats with the 208 amax in both calibers.

</div></div>

thats awesome to hear! where did you get your subsonic recipes for the 308?

 

[SABuzzard]

Re: 300 Blackout and 308 bolt action suppressed

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Malaga2</div><div class="ubbcode-body">The blackout bolt would allow for much heavier bullets...Ive used 240's and 250's in my Whisper without issue...no difference in sound to my supressed 308's </div></div>

Good point on the heavier bullets. 208/220s seem to be the limit in an AR. I keep forgetting how close 300 Whisper and 300 BLK are.

 

[mavrick]

Re: 300 Blackout and 308 bolt action suppressed

Another way to look at it is with my 300 whisper bolt gun and a 16in barrel I can run 220s on up with the can and have a nice quiet and short package and run 110vmaxs supersonic that hit harder that most 223/556 stuff again in a nice and short package.

I havent run subs through my 308 bolt because thats why I built the whisper for

Dustin
I now run a 1-4 vortex PST on it the can is a AAC Cyclone.

 

[springer01]

Re: 300 Blackout and 308 bolt action suppressed

I would bet the sound levels are close between a suppressed .308 sub and .300 BLK sub.
I don't have a 300 BLK yet, but I would venture to say your velocity is more consistent with the sub than with the .308 sub. I have a hard time keeping my .308 subs consistent. I use 10 gr trailboss and 178 amax in my bolt gun and sometimes its subsonic sometimes not. I am hoping with the 300 BLK I am about to build I can get a load that is subsonic and stick with it.

I know I kinda veered OT, but I think this one of the main benefits of the 300 BLK....and of course being able to run it through a semi-auto.