I have started working on my 250z. I don't envy, and don't want to be, a professional reviewer. There is a lot that I would say to someone face to face, where I could explain myself better, that I would not throw out into the ether. Southern Gunner got sued by some idiot who didn't understand what he was saying. No thanks! I won't be giving out tuning or modding techniques (dealing with triggers and safeties). It would behove anyone to buy some cheap airguns and learn how to work on different parts that the manufacturers really don't want you to. Once you develop an understanding anything becomes possible. It takes doing though, reading only gets you so far.
I will say, because it is true, that I got a problem child. What I am not sure of is whether my gun was a return, or if the o.e.m. screwed it up. It had a mark on the castle nut and on the pic rail, nothing major but noticable. I wanted a winter project, and I certainly got one. I thought for sure that I would be returning mine, but I started fixing it and have changed my mind. I'm keeping it.
The problems that I had were that the stock was stuck closed, the gun would not cock, the trigger wouldn't set. I fixed those problems and set the trigger to 20oz and took out the play. It's really nice now. I was hoping originally, that the gun would show up the way it is now, but no. The pins in the stock adjustment lever were so bent by someone reefing on the lever that the stock was never going to move. I had to knock the pins out, straighten them, and took a little off of the pin stop to get it to work. I also used cylinder hones on the butt stock because it was too tight to slide on the buffer tube. It still is tight, but can be moved now. It's plastic so I didn't go crazy on it. Since the gun was now at least functioning properly, I cleaned the barrel, aired it up, set the reg to 2300psi, and chronographed some 21gr .218 H&N slugs, to see what power I was at. It is doing 975fps, 44fpe. I was using 50 psi per shot, so I should get 20 easy, which is what I wanted. Nice! I had a Ronin on it and it was surprisingly quiet, so then I put on my STO Levitas and it was louder but not bad and only weighs about 2oz. Now I wait and check for leaks.
I have a plan for putting a ARCA swiss rail on the bottom of the stock so that's going to take a while. It will probably be spring before I am shooting it at this point.
Edit: The speed that I got was with the hs adjuster being flush, just like all the reviews I have seen, but I got there differently. I try to get my HS to have some free flight or be very close to being at rest. I use to work at finding one stronger spring and keep cutting a little until I get what I wanted, but that was really really tedious. What is only, just tedious, is using two springs. I cut the original down so it did not have any compression, and then put a second smaller spring inside that one. Yes, it is, or can be, a lot of trial and error, but in the end there is less of a chance of hammer bounce, and the rates are pretty much the same. I also put Teflon tape on the HS adjuster because it turned a little to easily for my liking.
I was relieved that this gun has zero ping. My P15 did, and I ended up putting a brass plug in the hammer face. SPA seems to have that under control now. Some of the screws on the gun were loose, you really need to check them all in these guns. That's why I think it is crazy to take these guns straight out of the box and just shoot them, unless you already had someone check it for you. I pushed a .218 slug down the barrel and while the push was very consistent, it was very light. Feeding into the chamber from the mag is good until right at seating. The leade seems to be rough. I will fix that as soon as I check the accuracy of the gun. If it shoots well, I'll leave it. It's all about accuracy.
Not a fan of how the fill port is so deep, that you can't push the probe to it's stop while connected to a hose because the shoulder of the connector hits the stock. It does work, obviously, but I don't like it either. And like Dana's review mentioned, WHERE IS THE PLUG? What genius thought that it was a good design idea to just leave that open to the elements? These things need to be said, -out loud! I was planning on leaving the fill probe in the gun, with a cap on that, but can't because the cap can't snap on to the probe when it is pushed all the way down, and I don't want to risk losing it. Small details, and not deal breakers, just a nuisance.