05-13-2024, 06:26 PM
Couple of suggestions from my end...
Some gas blocks are dimensioned to sit right at the gas block shoulder, some are designed to have that little gap -- so you've verified that your gas block is properly positioned? Usually the GB gas hole is big enough to accommodate some back/forth slop but it's good anyway to know yours is positioned centered over the barrels' gas port.
Some barrels will have a tight chamber, and some early 6Arcs were known to stick some rounds of factory in them, have you verified that your OAL setup in the chamber/bullet/cartridge is not jamming into lands, that it is not too tight...
Ok so next, for any new rifle I start with full open for 25-50 rounds, just so all the pieces have a chance to work together and get rid of any new-stiffness, before I do any adjusting. I've had some new builds that needed that as a break in period. Most of it was a 1-shot and eject or whatever. After break in they cycled fine.
Next, and others may have different views, but I like the carbine style butt stock and buffers and buffer weights. I've had couple of rifle length builds and they just don't seem to cycle as well as they should, but it all resolved after switching to carbine butt stock setup. Just seems like that 5.x ounce rifle buffer is too heavy or something.
I wouldn't think that a proof research barrel had a too-small of a gas port, so I'd leave that out of the equation, at least for now.
Some gas blocks are dimensioned to sit right at the gas block shoulder, some are designed to have that little gap -- so you've verified that your gas block is properly positioned? Usually the GB gas hole is big enough to accommodate some back/forth slop but it's good anyway to know yours is positioned centered over the barrels' gas port.
Some barrels will have a tight chamber, and some early 6Arcs were known to stick some rounds of factory in them, have you verified that your OAL setup in the chamber/bullet/cartridge is not jamming into lands, that it is not too tight...
Ok so next, for any new rifle I start with full open for 25-50 rounds, just so all the pieces have a chance to work together and get rid of any new-stiffness, before I do any adjusting. I've had some new builds that needed that as a break in period. Most of it was a 1-shot and eject or whatever. After break in they cycled fine.
Next, and others may have different views, but I like the carbine style butt stock and buffers and buffer weights. I've had couple of rifle length builds and they just don't seem to cycle as well as they should, but it all resolved after switching to carbine butt stock setup. Just seems like that 5.x ounce rifle buffer is too heavy or something.
I wouldn't think that a proof research barrel had a too-small of a gas port, so I'd leave that out of the equation, at least for now.