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Old 11-25-2012, 12:42 PM   #1 (permalink)
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Sear slipping

I know the theory of timing a cocker, but just I cantīt get it to work.

Bought some Works pneus and turned a sniper back to cocker, timed it to my best knowledge and air up.

It fires on trigger release. Does not stay cocked no matter what I do.
I then lower the sear lug gradually to a point where it overlaps the 3 way and at no point it works.
I then thought that searsping is too weak, and stretch it out, repeat timing again, no help.

At this point I say f** it and put the project away, the sear and lug just are not compatible, and I have another body to put the pneus in.

I just received my new frame, and put everything together.
So this is:

different body/ lower internals
different frame/sear etc.
same pneus.

The same damn thing all over again.
Sear wont hold, and it fires on release. So, any bright ideas?

The pneus have no qevs and they are works lpr, work ram, palmers quickswitch. Stock benchmark sear, square lug.
Cocking rod is not too short, the ram moves the backblock enough.
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Old 11-25-2012, 09:36 PM   #2 (permalink)
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Sounds like your ram doesn't have enough pressure, raise your lpr pressure and it should be able to cock it back now.
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Old 11-25-2012, 09:51 PM   #3 (permalink)
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I'd start by just ignoring the pneus and just get it to cock and shoot manually. You don't even need air. Get it to release pretty early in the trigger pull. If you can reliably cock it manually, leave the sear lug alone then start in on adjusting the 3-way collar. The goal isn't to have it dialed in 100% but just to get it timed and shooting prettly reliably so you can THEN start on the minor adjustments to the sear lug and collar to dial it in how you want it.
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Old 11-25-2012, 10:21 PM   #4 (permalink)
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stiffer sear spring helps. It's entirely possible that the sear is worn out too.
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Old 11-26-2012, 01:57 AM   #5 (permalink)
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It cocks back enough, If I keep the trigger back, itīs way past the sear activation point. When I let it go, It wont hold.

I have adjusted the shooting point according all timing manuals, trigger release point, 3way activation etc. It just wont hold the sear.

Searspring is not too weak, I even tried pushing the searspring by hand to give it maximum tension. Also two different sears used.
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Old 11-26-2012, 02:07 AM   #6 (permalink)
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Try a different hammer or lug, maybe? Or maybe a different mainspring?
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Old 11-26-2012, 02:09 AM   #7 (permalink)
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Already used two different bodies/hammer/lug/springs.
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Old 11-26-2012, 04:27 AM   #8 (permalink)
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Does it manually cock and shoot without the pneus engaged? If so, it's most likely still a timing issue.
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Old 11-26-2012, 04:43 AM   #9 (permalink)
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Yes, it shoots fine without air. And it shoot fine with air on and manually pulling the cocking rod.

I have timed it according to these instructions:

AutoCocker Timing
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Old 11-26-2012, 11:26 AM   #10 (permalink)
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Sounds to me like your firing point and recocking point are overlapping.

Move the firing point a little bit back from the very front of the trigger pull, and move the recocking point back some. Give them some room to do their thing.
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