need help with a gas block

[Lars]

So I finally shot my rifle after putting on the adj. Gas block. I set the set screw so my action will just stay open after the last round and everything seems to be working great. Here's my question. Before the adj. Block my velocity was 2648, and after installing I am now averaging 2830 fps. Is this due to more gas going down the barrel or is something off with my chrono. The load is the exact same, and the powder I'm shooting is supposed to be temp insensitive. Any ideas?

[MarkCO]

Something is off with your load or Chrono.

You want to set it where you have it...PLUS 1/2 turn out...or when it cools down...you might have a single shot.

[Lars]

The load came from the same lot that I reloaded when I shot it with the original gas block. The chrono was throwing some fits today. I finally took off the sun shades and it started working so maybe that had something to do with it. I'll just have to try again I guess and see what I get.

[Lars]

So I finally got my suppressor and everything seems to work. I adjusted the gas block down for use with the can and everything works great. I have the set screw completely buried and I'm still getting blowback in my face. It's turned down enough that the gun will not cycle without the suppressor but after what I spent and almost a year waiting, why would I shoot it without. I'm getting gas blowing out where my gas tube pins to the block as well. Any suggestions for that.

[MarkCO]

Most gas blocks leak there, loose fit between the tube and block.