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Jason, try 9.3gr of Lil'Gun with 2.10" COAL on the NOE 311247. Should run a little over 1000fps. Report back what you find, please.
Dinger

Right now I'm testing Lil'Gun and Russian 4198 (which has an equivalent burn rate as 1680) and It's cycling OK but the accuracy is sucky and it's hovering right around the subsonic range. I hope to...

Fisty at 100yd, what kinda accuracy are you getting @ 2.145"?

Are you using gas checks?

I plan to try 1680 soon as I can find some. thanx.

11.5 gr of 1680 produces what velocity? Cycling OK?

Moonie, thanks. My upper has an 8.5" barrel which is extended with a ported section to 16" which is covered by a suppressor. I'm running an Y/N NM Lite Bolt, low mass buffer and standard spring. ...

Yup, I think you're right. I was one of the 40. The suppressor really doesn't have much to do with my R&D at this point; I'm dealing with chambering/cycling problems. The 247 boolit just may be...

I must assume, after 68 views and no replies, that no one viewing is doing this. Maybe I'm trying to do something that just won't work in my rifle......
Dinger

I would like to start a discussion from reloaders who have a suppressed .300 BO on the AR platform and are loading the NOE 247 grain cast boolit. I have these questions which I think, if answered,...

It's been awhile since anyone posted on this question and I was wondering if anyone might have any updated experience or knowledge they'd like to share. I was looking at the 247 grainers in the .300...