Over gassed?

Moderators: gds, bakerjw, renegade

300blk_kid
Member
Posts: 27
Joined: Thu May 23, 2019 11:25 pm

Over gassed?

Post by 300blk_kid » Mon Feb 08, 2021 3:40 pm

std ammo only with a GM27 16" car barrel that has 120 gas port. FA bcg with H1 buffer & car spring.
It's kicking rather hard. Initially had a misaligned gas block and it fail to cycle every few rounds, but with this misalign the kick felt like an ez tap on my shoulder. Fixed the alignment issue and now I feel like I am being punched in the shoulder. Seems like overgas issue?

I don't see bcg or gas key hitting the lower anywhere.

Should I install an adj gas block, or swap out the gas tube for one of these http://blackrivertactical.com/WP/BRT-EZ ... p103167251

BulletFlight for Android
ReadyAimDuck
Silent Operator
Posts: 60
Joined: Tue Jul 14, 2020 11:08 am

Re: Over gassed?

Post by ReadyAimDuck » Mon Feb 08, 2021 8:47 pm

For that price, I would buy an adjustable gas block. Dial in the exact amount of gas you want. There is no telling that the hole in that gas tube is going to be the right size for your setup.

User avatar
dellet
Silent But Deadly
Posts: 6587
Joined: Fri Nov 30, 2012 1:25 pm

Re: Over gassed?

Post by dellet » Tue Feb 09, 2021 2:10 am

It’s cheaper than a new barrel, but not as veritable as an adjustable block. If you know the exact size of port you want, it’s probably a good choice, provided you also know exactly what ammo you will be shooting.
300 Blackout, not just for sub-sonics.

300blk_kid
Member
Posts: 27
Joined: Thu May 23, 2019 11:25 pm

Re: Over gassed?

Post by 300blk_kid » Tue Feb 09, 2021 4:51 pm

dellet wrote:
Tue Feb 09, 2021 2:10 am
It’s cheaper than a new barrel, but not as veritable as an adjustable block. If you know the exact size of port you want, it’s probably a good choice, provided you also know exactly what ammo you will be shooting.
I know I won't be shooting subs down this barrel.
I would have no idea what port size tube it would be, their online order page lets you pick some metrics and then they choose the "best" size.

I don't mind installing an adj block, it would be more of a set-it-&-forget-it thing, probably tune it to a light supe round.

I don't need a $100 block for this basic rifle, so what's the running suggestion these days for a low profile clamp-on adj 750 block? A see there's a few skeleton types, weight saving is good in my book.

User avatar
dellet
Silent But Deadly
Posts: 6587
Joined: Fri Nov 30, 2012 1:25 pm

Re: Over gassed?

Post by dellet » Tue Feb 09, 2021 11:44 pm

It would be interesting to see what they choose, before buying. I don’t know if that is an option.

I kind of like the port tuning insert. I would get that around .065” and drill it out to suit. I generally specify port size when I order a barrel.

As for adjustable blocks, I use the SLR. Everyone will have an opinion, but they have served me well.
300 Blackout, not just for sub-sonics.

300blk_kid
Member
Posts: 27
Joined: Thu May 23, 2019 11:25 pm

Re: Over gassed?

Post by 300blk_kid » Sat Feb 13, 2021 4:05 pm

Going with Odin Works tunable block.

300blk_kid
Member
Posts: 27
Joined: Thu May 23, 2019 11:25 pm

Re: Over gassed?

Post by 300blk_kid » Wed Feb 17, 2021 9:27 am

Odin Works tunable gas block (low profile SS). That's what I went with. Much better now. I should have went with an adjustable from the start.

ReadyAimDuck
Silent Operator
Posts: 60
Joined: Tue Jul 14, 2020 11:08 am

Re: Over gassed?

Post by ReadyAimDuck » Wed Feb 17, 2021 9:50 am

Thanks for the update! Thats good to hear. I'm very happy with mine (different brand but same thing) and it opens up a lot of possibilities for fine tuning with subs and shooting suppressed too.

300blk_kid
Member
Posts: 27
Joined: Thu May 23, 2019 11:25 pm

Re: Over gassed?

Post by 300blk_kid » Wed Feb 17, 2021 2:29 pm

But for clarity, the OW "tunable" is a set & forget type. They also have an "adjustable" for the gas system that needs to be changed often. I have no need to change the gas system parameters that much. Tuned to support non-sub ammo, and now it's gtg.

User avatar
dellet
Silent But Deadly
Posts: 6587
Joined: Fri Nov 30, 2012 1:25 pm

Re: Over gassed?

Post by dellet » Thu Feb 18, 2021 1:41 pm

300blk_kid wrote:
Wed Feb 17, 2021 2:29 pm
But for clarity, the OW "tunable" is a set & forget type. They also have an "adjustable" for the gas system that needs to be changed often. I have no need to change the gas system parameters that much. Tuned to support non-sub ammo, and now it's gtg.
They are just playing word games. They are both adjustable and tune able. If there was truth in advertising it would be easy tune and pain in the ass tune models.

One can be tune/adjust in the field with no disassembly, the other you will likely want to pull the handguard. so you don't lose the set screw.

There are plenty of the gas screw and set screw types out there where you don't have to remove one screw to access the other, where both screws can be accessed through the handgaurd. At least there were 10-15 years ago before the fancy click adjustables came out.

Just a choice

Good you got the rifle shooting like it should, no reason to be over gassed.
300 Blackout, not just for sub-sonics.

Post Reply