Got a Glock model from Calgary Shooting Centre a few weeks ago.
First time out I got 25 rounds of 124 gn CP with 3.9gn Ac#2 through like a charm.
Next couple of times I was having some wicked ejection problems (FTE's) with my own loads (124 gn FMJ, 4.3 gn Accurate No2, 124 gn CP, 3.9gn Acc#2, 147 gn CP 3.9 gn W231). Roughly 100 rounds through so far.
Could have been me - I'm going to focus on technique next time I hit the range. As a blow back, if you limp wrist or relax after the trigger breaks, that can introduce a vertical force that causes friction as the bolt travels rearward, causing an FTE.
Likewise, as a new gun, it's entirely possible the buffer spring stored energy is too high so as to prevent the bolt to either have the maximum velocity or travel distance needed to eject cleanly. I know in the debate between keeping mags loaded, there's a religious fervour that doing so doesn't weaken the mag spring - but I don't think that's the case.
Following Hooke's law, the total potential energy of a spring under compression is E=(1/2)kx^2, where x is the displacement of the spring from its equilibrium position (the spring at rest, not compressed). Every spring that I've ever seen that's been under any compression over any prolonged period of time shortens (x is reduced) when it's brougth to equilibrium - thus the stored energy of the sprign is reduced.
Applied to the Sub 2000, the energy transferred from the bullet being fired has to overcome the stored energy of the spring - and if the potential energy of the spring is higher than the energy of the bullet being fired (Ek - 1/2mv^2), the bolt won't travel rearward far enough, fast enough, to eject the round cleanly.
Another possibility - especially since Ac#2 is a pretty slow burning powder, it's possible powder residue could have blown back into the buffer tube, and I've heard accounts of the lube Kel Tec uses when they ship out their guns turns quite gummy. Tonight I used a shotgun swab with Hoppes 9 (for a manly clean) to swab the buffer tube, then I put a very thin coat of CLP on the bolt.
There's a 4th possibility I'm concerned about. After my first range run, in a rush to do a quick field strip/clean, I fired off the action when the bolt was out. Afterwards I read in the manual that's a big no-no and needs a factory repair. Now, the hammer blocks the travel of the bolt when I reinsert it and I have to use a tool to push the hammer down so the bolt can fit. Maybe (hopefully not), the hammer is sliding along the bolt as it recoils, causing the bolt to drag, causing my FTE's. I sure hope not, and if so, I sure hope it's something I can fix.
Some research says some owners have FTEs until the gun's broken in, so I figure I'll give it a fwe hundred more rounds to see if I can solve the FTE problems.
My $0.02 any thoughts?
First time out I got 25 rounds of 124 gn CP with 3.9gn Ac#2 through like a charm.
Next couple of times I was having some wicked ejection problems (FTE's) with my own loads (124 gn FMJ, 4.3 gn Accurate No2, 124 gn CP, 3.9gn Acc#2, 147 gn CP 3.9 gn W231). Roughly 100 rounds through so far.
Could have been me - I'm going to focus on technique next time I hit the range. As a blow back, if you limp wrist or relax after the trigger breaks, that can introduce a vertical force that causes friction as the bolt travels rearward, causing an FTE.
Likewise, as a new gun, it's entirely possible the buffer spring stored energy is too high so as to prevent the bolt to either have the maximum velocity or travel distance needed to eject cleanly. I know in the debate between keeping mags loaded, there's a religious fervour that doing so doesn't weaken the mag spring - but I don't think that's the case.
Following Hooke's law, the total potential energy of a spring under compression is E=(1/2)kx^2, where x is the displacement of the spring from its equilibrium position (the spring at rest, not compressed). Every spring that I've ever seen that's been under any compression over any prolonged period of time shortens (x is reduced) when it's brougth to equilibrium - thus the stored energy of the sprign is reduced.
Applied to the Sub 2000, the energy transferred from the bullet being fired has to overcome the stored energy of the spring - and if the potential energy of the spring is higher than the energy of the bullet being fired (Ek - 1/2mv^2), the bolt won't travel rearward far enough, fast enough, to eject the round cleanly.
Another possibility - especially since Ac#2 is a pretty slow burning powder, it's possible powder residue could have blown back into the buffer tube, and I've heard accounts of the lube Kel Tec uses when they ship out their guns turns quite gummy. Tonight I used a shotgun swab with Hoppes 9 (for a manly clean) to swab the buffer tube, then I put a very thin coat of CLP on the bolt.
There's a 4th possibility I'm concerned about. After my first range run, in a rush to do a quick field strip/clean, I fired off the action when the bolt was out. Afterwards I read in the manual that's a big no-no and needs a factory repair. Now, the hammer blocks the travel of the bolt when I reinsert it and I have to use a tool to push the hammer down so the bolt can fit. Maybe (hopefully not), the hammer is sliding along the bolt as it recoils, causing the bolt to drag, causing my FTE's. I sure hope not, and if so, I sure hope it's something I can fix.
Some research says some owners have FTEs until the gun's broken in, so I figure I'll give it a fwe hundred more rounds to see if I can solve the FTE problems.
My $0.02 any thoughts?
