Hello all, I'll try to keep this short but detailed enough to try and get some help. I searched the forums and the interwebs but found nothing similar, so here goes:
I have a newly built ARC Nucleus (2.0) that I put together in January (used a pre-fit barrel with the Bar-Loc setup) in 6.5 CM. It has a Trigger-Tech primary trigger and I put in a 16lb spring in place of the 25lb.
The rifle has just shy of 500 rounds on it and, for the most part, cycles and runs beautifully. A few times though, both in matches and practice, I've had an intermittent issue with difficult primary extraction. I can lift the bolt 90% of the way very smooth them it just seems to lock up to the point I have to smack the bolt upwards to finish unlocking it the last 5*of rotation. Once unlocked it cycles perfectly through ejection and chambering the next round.
I have only shot factory ammo (S&B and Hornady), none of the brass has any signs of overpressure or marks that would indicate a tight or poorly machined chamber.
It doesn't seem to have any correlation to how many rounds are in the mag or hot vs cold; had it happen on both full and near empty mags and beginning/end of strings.
With all that said, what can/should I check that may be causing the action to bind during primary extraction? Any thoughts or suggestions on what may be causing it? Thanks in advance for any help!
- Niko
I have a newly built ARC Nucleus (2.0) that I put together in January (used a pre-fit barrel with the Bar-Loc setup) in 6.5 CM. It has a Trigger-Tech primary trigger and I put in a 16lb spring in place of the 25lb.
The rifle has just shy of 500 rounds on it and, for the most part, cycles and runs beautifully. A few times though, both in matches and practice, I've had an intermittent issue with difficult primary extraction. I can lift the bolt 90% of the way very smooth them it just seems to lock up to the point I have to smack the bolt upwards to finish unlocking it the last 5*of rotation. Once unlocked it cycles perfectly through ejection and chambering the next round.
I have only shot factory ammo (S&B and Hornady), none of the brass has any signs of overpressure or marks that would indicate a tight or poorly machined chamber.
It doesn't seem to have any correlation to how many rounds are in the mag or hot vs cold; had it happen on both full and near empty mags and beginning/end of strings.
With all that said, what can/should I check that may be causing the action to bind during primary extraction? Any thoughts or suggestions on what may be causing it? Thanks in advance for any help!
- Niko
