Short-stroking with 90gr TNT, fixed with gas port work
#18
Harpoon1 Wrote:I fixed it by opening up the gas port to .078. Runs like a top now with the 90 TNT’s and H322 and 8208XBR. Even the starting loads a grain or two below max ran great.

I’m sure the H335 loads will be just as reliable now. It’s gonna be a hog/coyote rig, so the 90 TNTs are a perfect fit. Leaning towards H335 because it meters great on Lee Auto-Drum powder measure and their little 4 stage progressive press and the shots will be close, so temperature sensitivity won’t be an issue.

Thanks for the tips.

Great news. What was the original port diameter?

It should have been at that for MLGS 16”.
NRA Basic, Pistol, Rifle, Shotgun, RSO

CCW, CQM, DM, Long Range Rifle Instructor

6.5 Grendel Reloading Handbooks & chamber brushes can be found here:

www.AR15buildbox.com
Reply


Messages In This Thread
Short-stroking with 90gr TNT, fixed with gas port work - by LRRPF52 - 05-20-2022, 09:40 PM

Forum Jump:


Users browsing this thread: 1 Guest(s)