I thought I'd post results from some chrony testing I did with the Daystate Wolverine B-Type (.22 Cal, 30 FPE). Remember, this is an unregulated rifle - For a comparison, I've added a shot string from my Air Arms S510 Ultimate Sporter .22 (also unregulated) to the same graph. I used the pellets that gave me the best accuracy in each rifle (JSB 15.9 in the Wolverine, JSB 18.1 in the Ultimate Sporter). I also limited the curves on the graph to an extreme spread of 20 FPS for each rifle.
I'll be honest, I wasn't too surprised with the Wolverine's shot count - 80+ shots should be expected from a 500cc bottle. What I was surprised with, however, was the curve. Usually you expect unregged rifles to give you a very distinct bell curve. The Wolverine, between 225 and 190 Bar, had no curve at all.

What this tells us is that Daystate's excuse for excluding a regulator has been justified. They must have done something right with their Harper Slingshot Hammer system to achieve consistency like this. The Ultimate Sporter, on the other hand, is in desperate need of a regulator. Yes, the air cylinder is smaller...But you'd expect to see some kind of plateau on that curve from a company that claims that their rifles don't need regulators.
Another interesting fact to note is that the Wolverine achieves its 20fps extreme spread over a 60 Bar pressure range. The Ultimate Sporter does the same over a 40 Bar range. I think this is probably due to two factors: 1) The Wolverine operates at a higher pressure, therefore less air is needed per shot, and 2) The Ultimate Sporter is shooting with more energy, therefore uses more air per shot.
I will definitely be adding an aftermarket regulator to my Ultimate Sporter when I can get hold of one. This gun is WAY too accurate to be pushed aside - It actually shoots better than the Wolverine when in its "sweet spot".
If anyone has chrony results from an FX Royale 500 (or any other PCP for that matter), please post...Let's start comparing!

I'll be honest, I wasn't too surprised with the Wolverine's shot count - 80+ shots should be expected from a 500cc bottle. What I was surprised with, however, was the curve. Usually you expect unregged rifles to give you a very distinct bell curve. The Wolverine, between 225 and 190 Bar, had no curve at all.

What this tells us is that Daystate's excuse for excluding a regulator has been justified. They must have done something right with their Harper Slingshot Hammer system to achieve consistency like this. The Ultimate Sporter, on the other hand, is in desperate need of a regulator. Yes, the air cylinder is smaller...But you'd expect to see some kind of plateau on that curve from a company that claims that their rifles don't need regulators.
Another interesting fact to note is that the Wolverine achieves its 20fps extreme spread over a 60 Bar pressure range. The Ultimate Sporter does the same over a 40 Bar range. I think this is probably due to two factors: 1) The Wolverine operates at a higher pressure, therefore less air is needed per shot, and 2) The Ultimate Sporter is shooting with more energy, therefore uses more air per shot.
I will definitely be adding an aftermarket regulator to my Ultimate Sporter when I can get hold of one. This gun is WAY too accurate to be pushed aside - It actually shoots better than the Wolverine when in its "sweet spot".
If anyone has chrony results from an FX Royale 500 (or any other PCP for that matter), please post...Let's start comparing!