Adjustable gas block and ladder testing

[PD Gohil]

I'm new to reloading. Please be patient. I built a 16" .223 on a 1:8 barrel with an adjustable gas block. how should I set the gas block for ladder testing? I am seeing there being more pressure running back against the bolt the higher the powder charge. In theory I want the bolt to come back just hard enough to reliably lock but no more. I appreciate everyone's input and help in this.

Right now this rifle shoots just under one MOA with Hornady precision 75 gr ammo. My goal is to try to get it at a half MOA with Barnes TSX 70 GR.

PGohil
WV

 

[RegionRat]

The basics are that you want some more margin than just barely locking back.

Check to see the angle in clock terms. 2 to 4 O'Clock isn't going to over stress the gun or the brass in typical situations.

 

[Lone Hunter]

Maybe this might help a little. Maybe not. I like mine at about 4:00 ejection. Seems to run pretty good there. Makes it easier to find the brass too.

 

[pdhntr]

I'm new to reloading. Please be patient. I built a 16" .223 on a 1:8 barrel with an adjustable gas block. how should I set the gas block for ladder testing? I am seeing there being more pressure running back against the bolt the higher the powder charge. In theory I want the bolt to come back just hard enough to reliably lock but no more. I appreciate everyone's input and help in this.

Right now this rifle shoots just under one MOA with Hornady precision 75 gr ammo. My goal is to try to get it at a half MOA with Barnes TSX 70 GR.

PGohil
WV

Unless there is something I am missing, the gas block shouldn't affect the ladder at all. The bullet is gone by the time gas initiates the cycle.

http://forum.accurateshooter.com/threads/ar-15-bullet-travel-vs-bolt-travel.3992899/

Jim

 

[Sniper338]

Unless there is something I am missing, the gas block shouldn't affect the ladder at all. The bullet is gone by the time gas initiates the cycle.

http://forum.accurateshooter.com/threads/ar-15-bullet-travel-vs-bolt-travel.3992899/

Jim

This... bullets gone

 

[PD Gohil]

View attachment 1170249 Maybe this might help a little. Maybe not. I like mine at about 4:00 ejection. Seems to run pretty good there. Makes it easier to find the brass too.

Thank you! I'm pretty new to gas guns, and this greatly helps me. I have noticed a difference between ammunition and where the brass lands and this explains it.

Thanks again!

PGohil
Wv

 

[PD Gohil]

This... bullets gone

Reading through that post was mentally exhausting. Lol. But all in all good info. I'll make sure the gas block is adjusted so it is throwing ammo between 3:00 and 4:30. And I won't worry about it then. Thanks all.

PGohil
WV