Thanks for the info on the Noveske. Marty gave me the specs on his barrel and his is looking like the way to go. It's the profile I want, has the gas port in pistol position, and has the right sized port diameter. I think I'll order it from him when I finally get my Form 4 back approved. :rolleyes:

I also am determined to assemble/purchase a .300/221 SBR upper that is 10.5" in length & will cycle both sub&supersonic with & without a suppressor,& with no adjustable gas block or gas tube.Has anyone been able to achieve this? So far, I have a Model 1 Sales 16" barrel that will not chamber standard Whisper lengths. I plan to block the carbine port,& make another port @ the pistol position.
From everything I've read,there is no magic gas port size that will do all of the above mentioned without the assistance of adjustable gas components.
Since the M1S barrel was inexpensive,and seems to have chambering issues, I am going to try to make this work before consulting the high-end gurus.

Alcoholicus Maximus,
Marty over at Teppo Justsu said that he could port one at the pistol location and it would work with both subsonic and supersonic loads. I'll let you know when I get mine. I just got my Form 1s for my SBRs back approved today. :smile: I'm now a stamp collector! :uzi2:

I called Marty last week and he told me 16 weeks is the min right now for the 30 cal 1:8 twist blank for my 300/221 rig.
I called and ordered my barrels from Noveske as he had them in stock ready to go. I was unaware of the non .750 dia gas block however, is this a big deal?

Wow, 16 weeks. It figures. I get my forms back quicker than expected and now I will end up waiting on the barrel. :frown: Oh well, I'll send an email off to Noveske and see what I can get there. I saw them listed on another site for sale but they were 10.5" Stainless. I want a 12" Chrome/Moly. I'm picky about this build. :grin:

AM,
It appears that the M1S barrels in .300-221 Fireball are a little short in the throat as compared to JDJ's true 300 Whisper.
Simply seat your bullets a little deeper & back off t6he charge a little until you find a happy median.
That's what I did especially w/long 220 & 240s