Thompson Center Encore Classifieds
Find your Encore Barrels here!

Home » General Conversation » Photos » 30 Herrett as Rimmed Blackout (new furniture for custom barrel)
30 Herrett as Rimmed Blackout [message #44394] Sat, 21 July 2018 12:41 Go to next message
gemihur is currently offline  gemihur
Messages: 254
Registered: March 2012
Location: Ridgelines of Virginia
Forum Regular
Recently got curious as to the 30 Herrett's performance as a 300BLK.
Stumbled upon a threaded barrel. No, it's a vented extension, threaded and pinned.
Trail Boss ended up providing the velocity sought.
(Pic removed. Way too big. Please resize pics before posting)
Forearm of spalted sycamore, stock of burly maple


Think twice...shoot once.

[Updated on: Tue, 02 June 2020 12:34] by Moderator

Report message to a moderator

Re: 30 Herrett as Rimmed Blackout [message #44395 is a reply to message #44394] Sat, 21 July 2018 14:32 Go to previous messageGo to next message
sunnysmarine is currently offline  sunnysmarine
Messages: 829
Registered: July 2011
Location: CA
Senior Member
good job on that stock buddy, what velocity are you getting at what charge?? I was thinking of having my BO barrel rechambered to a Herrett, may have to now
Re: 30 Herrett as Rimmed Blackout [message #44396 is a reply to message #44395] Sat, 21 July 2018 15:04 Go to previous messageGo to next message
gemihur is currently offline  gemihur
Messages: 254
Registered: March 2012
Location: Ridgelines of Virginia
Forum Regular
Sunny, the blackout has way less case capacity but functions at way higher pressures. I don't claim to have the 'magic bullet' by any means.
The barrel's twist was a shortcoming as it's a 1:14" and to stabilize a big 168 gr. bullet requires around 1550 fps. My subsonic load is 5.5 gr. Trail Boss behind 110 gr. Hornady for 1020 fps.
I don't understand what's all the fuss to go subsonic unless it's for efficient use of a can, because the trajectories are shameful beyond 100 yds.
I'm more apt to rely on Bob Milek's original recipe provided to DuPont in their 5/1/85 publication "Making Your Contender Perform"
where a 150 gr. spitzer pushed by 21.3 gr. of IMR 4198 gets you 1760 fps for 1031 ft/lbs of knockdown energy.
I'd rather hunt than target shoot anyway.


Think twice...shoot once.
Re: 30 Herrett as Rimmed Blackout [message #46063 is a reply to message #44396] Mon, 01 June 2020 09:29 Go to previous message
gemihur is currently offline  gemihur
Messages: 254
Registered: March 2012
Location: Ridgelines of Virginia
Forum Regular
New grip work on 12" Max Bbl
Loads are 180 gr. cast w/20.0 gr. W296 & 158 gr. SJHP w/17 gr. IMR 4227
https://i.postimg.cc/3xm0ghgs/max-and-grip.jpg


Think twice...shoot once.
Previous Topic: Color Cased Thompson New build
Goto Forum:
  


Current Time: Fri Jul 03 09:46:54 EDT 2020