Pdi cylinder sets for Bolt Action?

[DreadHead]

Looking to fill m24 with pdi upgrades. Been doing some reading and I am not sure what cylinder set will best suit my needs.
Any assistance would be appreciated.

So far a have a CA M24
Pdi hopup w/ rubber
Madbull 6.03 inner barrel
4 pdi barrel spacers
Stock trigger ( from what I have read it is more than sufficient)

I want to achieve a smooth, relatively easy bolt pull, and shooting around the 400 fps with as little deviance as possible.

From what I have read the raven set would be sufficient, as the fps is not excessive. The cost of this rifle is not an issue for me, so if another cylinder would suit better I'd prefer that.

So my question is what are the major differences/ advantages between the precision vs palsonite cylinder?
And the hard vs vacuum piston?

Thanks in advance
Dread

[chaz]

I've been looking at all of those myself.
I have come to the conclusion that the Raven set, although nice, lacks some of the nicer features of the precision and palsonite sets. Bearing spring guide, hardened steel and better piston vs the raven set.
And from what I can tell, the difference between the precision and palsonite set is the durability, as palsonite is a form of metal hardening.
Not sure about the vacuum part, would be best for the pros to jump in and answer that one as I am curious myself.

I plan on going with the palsonite set (Not sure of HD or VC yet), with stock barrel polished inside, homemade paper spacers the entire length of the barrel, stock hop up unit with clear rubber and stock trigger (from what I have read they are built like tanks).