Using 18.52 grn H&N

Pumps            ft/lb

4                      9.38

5                     11.32

8                     15.6

9                     16.9

10                   18.01

12                   19.5

16                   21.3

So as BC Clark says, there is really a lot more that could be done to develop pumpers, but at 4 pumps, that's a respectable bit of power I reckon.  I see they have put out a pcp version of the 362 called 3622 I think.

My first airgun was Crosman 760 with rifled barrel.

Easy to shoot accurately compared to springers since there's very little moving mass. Less hold sensitive.

Then I modified a Crosman 2289 pistol (.22) up to around 19 ft-lbs with short barrel.

Made it into a 23 ft-lb rifle with a stock and long barrel. Shot out to 100m.

Around 30 easy strokes for full power.

Then turned my Crosman 760 into a 50 ft-lb pistol.

Also a ground-up 100 ft-lb rifle with free floating barrel so the pressure doesn't alter the accuracy.

The pumper platform is really under-appreciated by manufacturers.

I don't see anything with the quality of high-end springers or PCP's

so it seems a really good pumper needs to be built up.

I haven't personally tested mine in terms of power but pumped 8-10x the internet generally reckons in the 18-22 fpe area.

As for accuracy, my recently refurbished one put pellets into a 10mm group at 20m.  In the past I've shot 1/2" groups at 30m.  So pretty accurate.

Accuracy doesn't seem to be affected by pumps, more like the pellet you choose.  I am confident I could stack pellets at 10m with 4 pumps with the right ammo....