That is because the Hornady brass is 300 BLK spec brass.


Who said there is a difference in chamber dimensions when it comes to brass? While I have never seen an SSK drawing, I am under the impression, based on talking to a licensee, that the only significant difference is in the throat.

You have this backwards. The BLK has the longer throat.

Certainly if you commercially load for Whisper(R), you need to load for the smallest chamber ever called Whisper.

I am not sure I follow you. What am I reluctant to say?

It's stamped 300 Whisper.



Agreed.

No I don't. In my SSK Whisper straight from JDJ has a longer throat than the Blackout I own. The 300-221 fireball has a very short throat. Which chambering did you play with? I would be happy to ship my SSK upper to you or AAC for verification.

So the Remington Blackout ammo I just ordered won't chamber in my Whisper?


Just that I understand that there are things you can't say because of legal reasons. I don't blame you for picking your words carefully. If you ever did say Blackout ammo could be shot out of a Whisper someone would try to use it aganst AAC and Remington. I've been on your side, but the comment that Smith & Wesson's people are "wrong" rubs me the wrong way. You may be right, but you could also use some tact. Like I said sometimes it's better to say nothing at all.

I know, but it is verified to be within 300 AAC BLACKOUT specs, and tested in 300 AAC BLACKOUT guns.

Ok, I will remember that I don't really know about SSK chambers. I do know there are at least two, maybe four or more different chambers called 300 Whisper. If you want to be sure you can shoot 300 AAC BLACKOUT ammo, it is best to run a 300 BLK reamer in it.

I don't know. We took Remington 221 Fireball and opened it to 30 cal, but kept the same headspace, and picked some radii for the neck and shoulder - and a chamber neck diameter which would work with most 223 and 5.56mm converted brass, and then set the throat so that if you loaded a Sierra 220 to 2.26 OAL, it would be 0.010 from the lands.

I would not claim you could shoot 300 BLK ammo in a Whisper for many reasons other than legal - I have never tried it.

I see - you are excited that there is a factory rifle chambered in Whisper. Yes, I can understand that.

complete derail here, but I remember reading last week that the owners of the 6.5 have surrendered their trademark on the Grendel so that it could be standardized via SAAMI

that is actually a pretty good pic Ron, it has almost an art feel to it.

from the S&W web site