07-30-2013, 03:06 AM
I cleaned my rifle any inspected everything. Gas key, BCG, gas block all looked good. The gas port was open. I reset the gas block t make sure it had best flow possible. It was already there.
LRRPF52 you are right. FPS was higher than Ramshots manual by 100 fps. I believe Hornady now says 2620 on AMax, I was getting 2600+. I was so focused on FTF I missed the velocities.
I'll pick up a set of drill bits with index and measure my current gas port.
Good to know about the bolt over base TFS. I think you nailed it with the short stroke. I saw similar things with subsonics in my 300 blackout right after I completed the build. A super light buffer helped until I got it broke in. I tried the same light buffer in the Grendel, it didn't help. That buffer and a light bcg way help, just don't have one handy.
I'll see the measurement of my port and go from there.
Thanks for all the help.
LRRPF52 you are right. FPS was higher than Ramshots manual by 100 fps. I believe Hornady now says 2620 on AMax, I was getting 2600+. I was so focused on FTF I missed the velocities.
I'll pick up a set of drill bits with index and measure my current gas port.
Good to know about the bolt over base TFS. I think you nailed it with the short stroke. I saw similar things with subsonics in my 300 blackout right after I completed the build. A super light buffer helped until I got it broke in. I tried the same light buffer in the Grendel, it didn't help. That buffer and a light bcg way help, just don't have one handy.
I'll see the measurement of my port and go from there.
Thanks for all the help.