Ultralight Ultralight Rifles

[doverpack12]

What velocity do you get with the factory 108eld? And if memory serves, you are using the BCA side charger not the bolt action upper... how is the extraction with the 6ARC?

Various lots of Factory 108 were between 2480 and 2440. Correct BCA side charge upper not their newer bolt version.
Extraction is fairly easy until the brass starts to show pressure signs.

 

[KyleR1985]

I’m not trolling, just an observation from a set up I had.

When I finished shooting I got home and put the rifle on a block and could flex the barrel more than it should move. I double checked it against my other rifles and they didnt do that.

You’re saying you could bend a Faxon pencil barrel? Or are you saying that you could flex the barrel at the upper receiver/barrel extension and nut joint?

 

[justinspicher]

I could flex the barrel at the muzzle further up and done, left to right, more than I could on any of my other rifles.

 

[KyleR1985]

I could flex the barrel at the muzzle further up and done, left to right, more than I could on any of my other rifles.

Sorry I’m not trying to be annoying.

Are you saying the barrel would bend/flex in the middle of its length, or are you saying the upper/barrel joint allowed the end of the barrel to move.

Two very different problems.

 

[packgoatguy]

I could flex the barrel at the muzzle further up and done, left to right, more than I could on any of my other rifles.

Sorry to hear your experience with a pencil barrel wasn't ideal. It's good to hear feedback that doesn't align with our own experience, as it helps us learn. I for one have not experienced what you have, as my several ULUL builds (including with a faxon pencil barrel and a shaw barrel which is even lighter) have been around MOA. Probably 1.25moa would be conservative, but I have days when I can keep it under moa, so I'm sure I'm the weak link not the rifle. If you decide to take another plunge into the ULUL world, I'd be happy to share my build list.