Tax stamp has arrived

[2006Blackpearl931]

So I mailed a Form 1 on March 15th. Got my stamp in the mail today. It actually got here sooner than I was expecting. I will be busy in the shop tomorrow!

[whitewolf001]

Congrats, we expect a range report to follow. ;)

[2006Blackpearl931]

I will take a few pics of the machine work. And post results from the range. I'm planning a monocore design for my 300BLK AR.

[2006Blackpearl931]

Well. Here is what I have so far. 304 stainless steel core. 8" length. 1.375 O.D. Blast chamber is 2.125, then four .900 chambers and last a 1.100 chamber. The groove is for an O ring. It is a direct thread.  I may do a few small modifications to a few baffles to disrupt flow.

[Capbyrd]

Nice. Really want to see how this turns out.

[JohnC]

In for the pics/tech!

[Dolomite_supafly]

That looks great. If I had the ability to do a monocore my can would be very different.

[2006Blackpearl931]

DS, yours will be much quieter though. I considered doing some funky angles and stuff like AAC does on their monocore, but decided as much volume as possible is more important to me.

[Dolomite_supafly]

DS, yours will be much quieter though. I considered doing some funky angles and stuff like AAC does on their monocore, but decided as much volume as possible is more important to me.

Your can is going to surprise you. Volume is king in the suppressor world and that one has a tone.

 

BTW, what caliber is it for?

[2006Blackpearl931]

300BLK. I've loaded up a bunch of subs using your IMR4227 recommendation. Using 208gr Hornady bullets.

[2006Blackpearl931]

Here is a picture of the suppressor on the rifle. Video link coming soon. It's pretty quiet.

[jacob]

Nice work....like the paint on the rifle as well....

[2006Blackpearl931]

The first round is supersonic for comparison purposes. Enjoy and let me know what you think.

https://www.youtube.com/watch?v=qgkB1vLWdfU&feature=youtu.be

[Johnny Rotten]

were is that?

[2006Blackpearl931]

My brother in laws house

[Dolomite_supafly]

I would drop the charge down a lot more, most of those sounded like they were going supersonic.

[2006Blackpearl931]

Well. I have shot several across my chrono and they average around 1075-1100. That's with 10.0 gr of IMR4227. I'm gonna drop it to 9.6-9.7gr. I don't know how accurate the chrono is.

[2006Blackpearl931]

DS, do you crimp at all?

[Dolomite_supafly]

1,075-1,100 is supersonic in the wintertime. The speed of sound changes with temperatures. I have loads that were running 1,050 fps in the summer but are now supersonic. I now run mine below 1,000 fps to ensure they stay subsonic regardless of which gun I shoot them out of.

[2006Blackpearl931]

You are like an encyclopedia for anything firearm related. As I have seen others mention before. We thank you for your advice and insight!

[Dolomite_supafly]

No problem, just don't want you to think that is how loud it should be. Now we need to get together and compare mine to yours.

[2006Blackpearl931]

I am going to load a few today with 9.5gr and see what they do. I have watched several videos on youtube, and in several of them you still hear some report. But then there are a couple videos that's like, dang you only hear the action of the rifle. That is obviously the goal. We might be doing a Gatlinburg trip before too long. Sounds like a great chance to meet in person and compare notes.

[2006Blackpearl931]

Gas port is .101

 I did make an adjustable gas block that works really well. I adjusted it in until it turned into a bolt action rifle, then backed it out a half turn and ran about 50 rounds through it. Cycled perfectly and put all the brass in a pile at 4 o'clock. I am still learning and figuring out what works. Yesterday was the first time I got to shoot it. So I was excited that it ran well and didn't have any issues. Now its just a matter of fine tuning the load. I have added a couple cone shaped inserts to the core. I just welded them in place. In the blast chamber and the last chamber. They should help disrupt some.

Edited January 2, 2015 by 2006Blackpearl931

[2006Blackpearl931]

How about these?

https://www.youtube.com/watch?v=87avuL4AZPo&feature=youtu.be

[MacGyver]

That's more like it :)