What power do you run your 2300Ts at?

I've seen them mentioned on here and, I do like them. I bought one from a classified sale over here (it turned up with a weird smell but, that's another story) and, I've turned it into a kind of carbine.

It shoots nice, it's quiet, it's small but, it's giving less than 3ftlb with bog standard .177 JSB pellets.

One of my favourite hunting pellets is H&N Barracuda Hunter Extreme (that nose shape seems to dump energy into anything that it hits) but, this little gun just would not be accurate with them - I've had them be very accurate in other rifles closer to our 12ftlb limit.

My theory is that they just need more speed to be a great pellet.
I can easily crank up the power on the 2300T but, when I asked about it on a British forum, the silence was deafening (most over here are so reluctant to discuss power of airguns).

So, what's the theory here? - what do you run your 2300Ts at? Should I just crank this one up a bit and test again?
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The 2300 series use a lighter hammer spring than the 2240 series. They also have a brass spacer inside the valve which can be removed. The return spring in the valve is different but I would just leave it alone. Longer barrels help, yielding about 10 fps per inch.
I would get a 2240 hammer spring, remove the spacer and turn the power adjuster all the way up.