Where 300 Whisper and 300 BLK collide
 

I am on my third 300, the first 2 were dedicated 300 Whisper (prior to the BlackOut), the newest is a 12" blackout upper.

All my shooting is with reloads, various recipes, all subsonic.

The first 2 shot OK, grouped well at times, threw fliers more than I wanted.

The newest 12" SBR (barrel from Spook) in 300BLK, shooting rounds built for my 300Whisper, all reloads are using Whisper dies. The new upper shoots great, much quieter than the 8" upper, much more accurate and reproducible than the 16" or 8" prior 300s. Strangely, the new 300BLK shoots whisper ammo better than any 300 Whisper I have owned/shot.

Maybe one day, there will actually be 300BLK ammo to buy; till then, my gun and I are happy with 220SMK and 209 Amax, both at 1025, both shooting well under 1 MOA at 100 yards.

If you don't like how your Whisper is grouping, consider a BLK barrel swap, it worked great for me.

http://i250.photobucket.com/albums/g...d/IMG_1207.jpg

Nice looking rig!!

The blacksheep chamber is so unbelievably similar to the whisper I'd doubt it is what made the difference.:smile:
In my mind the "difference" between the two is so negligible ...there might as well not be any.:eek:

What about Hornadys new whisper ammo? They are saying that you can shoot it in both chambers? But the whisper ammo has a longer case length...hows that working?

Hornady Whisper(R) ammo has a 300 AAC BLACKOUT case length.

The AAC 9 inch upper was tested at an average of five consecutive five shot groups - 1.1 MOA - Berger 110 bullets. Sierra 110 bullets were about 1.2 MOA.

A 16 inch fixtured test barrel, 1/8 twist, with a 300 AAC BLACKOUT chamber - 0.8 inch group at 100 - Berger 110, again, 25 rounds. Sierra 110 was 0.9".

Just to be clear - these are not BS 3 shot groups. These were 25 shots total with all counted.

rsilvers can you explain "fixtured test barrel" please:confused: I'm a bit mystified. Thx

We have one kinda like that at the Olympic Training Center for testing different lots of smallbore ammo and barrel indexing. Worth their weight in gold.

The ammo and resultant groups posted above, from bullet weights, all would appear to be super, yes?

Small groups with supersonic ammo are far easier than small groups with subsonic.

I have yet to see a problem with a 300 shooting supers, groups are 1MOA or so in the right hands.

Subsonic tight groups are a different thing altogether.

I'm just say'in.

What distance, 100 yds or feet?

Yards. I never heard of someone shooting for accuracy at 100 feet.

I have, most do in "indoor" ranges for small bore comps and most who use test fixtures thats why I asked. Since rem is such a big company I figured they did it indoor at a 33yd distance since there would be no wind and temp/humidity controlled...

We have some stuff tested indoors at 300 yards.

^ That would rock

Midway currently has the Remington 220gr AAC rounds in stock.

I had a chance to put a few Rem 300 BLK rounds through my gun (12" 5R Rock barrel) and had a few thoughts:
1. The subsonic rounds were indeed subsonic - which is good.
2. The Remington rounds were appreciably louder than my hand loads (lil gun.)
3. The Remington rounds were not as accurate as my hand loads.

That said, a friend was breaking in his new Noveske 16" 300BLK rifle, and his gun liked the rounds more than mine (then again, he had a longer barrel and a higher power scope.) Likewise, he commented that the Remingtons were louder in his gun than were my hand loads.


And his 16" wouldn't cycle with the subsonics without a can - but functioned fine with a can.

All in all, the price of the Remington makes them a decent deal, but for quietest report and most accuracy, hand loads still win.

And, FYI: my hand loads are reloaded on Whisper dies and to Whisper specs. The 300BLKs I shot this weekend were the first BLK rounds through my 300BLK barrel. I'll stick with Whisper specs when quiet and accurate are needed.

But for $21/box...

Thanks Rancid
 

Thanks for the field testing report.

I have been following the 300 BLK and all the new information I can find. I am a long time 300 whisper user and have accumulated four encore and contender barrels made by Thompson and SSK in pistol and rifle lengths. I also have one each of MGM 300-221 in contender and an EB Brown 300-221 Encore barrel. All shoot my 300 Whisper reloads in super and sub accurately. I don't have a suppressor yet but so far my subs aren't much louder than a 22 LR using N110 powder.

I have so many barrels in the same caliber as they are spread out in VA, Paraguay, and Uruguay where I have hunting lodges.

I like the 300 BLK based on what I have read but don't think I will change over as I have so much invested in the whispers and 300-221's.

I assume the 300 BLK's will load in a 300 whisper chamber if I ever had a need?

If I am mistaken, please correct me, but I think 300Whisper works fine in a 300BLK but not the other way around. BLK can handle higher pressure than Whisper, so whisper ammo in a BLK is no problem; but BLK ammo in a Whisper might be dangerous.

For not much $$, you can have your Whisper barrels reamed to BLK, it's what I did and it worked out very well.

There is no one chamber called Whisper. There are many. All of which will have more pressure than normal if you shoot 300 AAC BLACKOUT ammo in them. Some worse than others.

Shooting 300 AAC BLACKOUT in a Whisper chamber is a bit like shooting 5.56mm in a 223 chamber.

Also I got a stuck bullet in a 300 Fireball chamber. Point is - there are a lot of random chambers out there - which is why when we standardized it, we could not call it 300-221 or 300 Fireball. We had to start fresh.

http://i257.photobucket.com/albums/h...ord-766245.jpg

:grin:

I'm a bet slow
 

Thanks for the info, I will never ever try a 300 BLK in my whispers.

I definitely don't want to hurt myself or my barrels. I will stick with my Whisper reloads and stay safe.

Alleycat,

As many times as it has been said, people are still just learning that. It is important to be patient and keep on explaining it.

Check and see ?
 

martineta .. Just get a 220 or whatever size bullet you are going to shoot in 300 BLK and check to see at what length it hits the lands.
I got my 300 BLK from Midway a few weeks ago the first thing I did was pull a bullet from one of them and check to see what OAL was okay .. On my
M1S 300WTF the length was okay .. Try that first before giving up .

300 AAC BLACKOUT hits the lands with a Sierra bullet at 2.270 OAL.