Getting fermentation to finish?

[CheftonUTD]

This is the biggest beer I've made so far (1.070) and it seems to be struggling to get down to FG (predicted 1.016-1.020). Below is the recipe and gravity readings:

Coopers IPA
16/02/13 1.070
04/03/13 1.027 (after this reading I gently swirled the fermenter around a bit to try to get any fermentables and yeast to get into suspension. For the next few days started bubbling again and seemed to be working.)
13/03/13 1.023

Extract Tin 1.7kg (3#12oz)
Coopers LME 3.0kg (6#10oz)
DME 0.8kg (1#12oz)

25g Amarillo @ 60
25g Amarillo @ 45
20g Amarillo @ 20
30g Cascade @ 20
30g Cascade dry hop

Safale S-04 18g
Fill to 23L (6.1G)

*Yeast was just sprinkled in dry and whisked aggressively to aerate. Very agressive fermentation for days 2-4.
*My temp control fridge is occupied so this has been swamp-coolered at about 78F.


Anyway, my question is, I'm pretty close to my predicted FG now, should I just take another reading in a few days to see if it matches then bottle.
Or should I try to stir the trub a bit to see if there's any more fermentables that could be mixed through.
Mostly I'm just worried if it's stalled but not really finished if I could end up with a false 'stable FG' reading and have bottle bombs.

Sorry for the long rambling question, trying to make sure I included any important info, thanks

 

[GenIke]

I'd say its likely done. If it was mine I would let it sit a few more days to be sure and then bottle.

 

[Nunner]

I would think it would be done, if you are still worried take another reading in a couple days to be sure and bottle it up!

 

[CheftonUTD]

I'm bottling a different batch today, so it will be about 3 days until I was planning on bottling this one if it's ready to go anyway, I'll check it again then and see what it's up to.

Also, I can't find an answer to this anywhere, my other batch was stable at 1.013 at readings 5 days apart (it's been in the primary for 3wks prior to crashing), I've cold-crashed it to 40F for 2 days and now it reads 1.010. Would I be right to assume that's an effect of particles settling out of suspension, and not that it's somehow restarted fermentation?

 

[C-Rider]

At that high temp I'd guess it's done. But as others said when the SG stops changing it's done.

Do you have a correction formula for the lower temp? i don't but that could be a reason for the lower SG reading.

 

[stvo]

I think it's pretty much done, couldn't find too much info on that yeast but found that it has an attenuation of 70-75% with your SG your FG should be somewhere in the range of 1.017-1.021 so you're not far off, It's not a small beer so give it another week to be sure. Maybe running it a little hot may have been an issue,
per Fermentis: t12-25°C (53.6-77°F) ideally-15-20°C (59-68°F) that first temp range is almost a 25*F temp swing??

 

[CheftonUTD]

My hydrometer came with a temperature-correction chart, I've been using that so I think my readings are accurate/consistent at least.

Thanks everyone for the help, thought I better ask since my previous batches were all below 1.045 OG and fermented more predictably than this one