Short-stroking with 90gr TNT, fixed with gas port work

[Harpoon1]

[lazyengineer]

Odd. There is nothing obvious to me at first glance to be causing this, aside from a gas bleed somewhere?

[Harpoon1]

[Klem]

That sounds like a reasonable load.

What weight buffer and spring are you using?

[lazyengineer]

American Eagle is smoking drugs on that velocity claim. Don't use that velocity as a benchmark for anything. No reloading manual anywhere reports that, even in 24" test barrels. There is some serious rounding up going on there.

[Harpoon1]

That sounds like a reasonable load.

What weight buffer and spring are you using?

[Harpoon1]

American Eagle is smoking drugs on that velocity claim. Don't use that velocity as a benchmark for anything. No reloading manual anywhere reports that, even in 24" test barrels. There is some serious rounding up going on there.

[myrifle]

No you did it the right way. Always fix the route cause of the issue. In your case it was a small gas port.

Now going the lowmass bcg and adjustable gas will make your gun run very much better.

So your on the right track for sure. A good tip is too set your gas too the weakest ammo you have. I set my gas with the wolf steel case ammo.

Also if you want to really make your rifle feel butter smooth. Add a JP scs to it.

[ragrendel]

FWIW, an adjustable gas block does nothing for under gassed problems. They only help to reduce gas not increase it.

[montana]

Adj gas blocks leak more gas than a standard block which could be the difference.I would be sure to check every other option before drilling out the gas port..
There could be many other reasons why your rifle is short stroking besides a small gas port..

Drilling the gas port should be the last option.

ragrendel is correct about adj gas blocks...

[Harpoon1]

Adj gas blocks leak more gas than a standard block which could be the difference.I would be sure to check every other option before drilling out the gas port..
There could be many other reasons why your rifle is short stroking besides a small gas port..

Drilling the gas port should be the last option.

ragrendel is correct about adj gas blocks...

[montana]

I never said you did, I was confirming ragrendel's statement about adj gas blocks..

Were you having over gassed issues before you installed an adj gas block?

[Harpoon1]

[Harpoon1]

American Eagle is smoking drugs on that velocity claim. Don't use that velocity as a benchmark for anything. No reloading manual anywhere reports that, even in 24" test barrels. There is some serious rounding up going on there.

[LRRPF52]