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My FX Maverick with 700mm heavy liner (1:18 twist) liked the old NSA 54.5. Like you, I can't get the new 54.5 design to group as well. Have you found a non-NSA 55 (ish) grain slug that works as well as the old NSA 54.5? stovepipe

Somewhere on this forum there must be a graph of muzzle velocity vs change in hammer spring preload when the plenum pressure stays the same. There should also be corresponding graph showing muzzle velocity vs change in plenum pressure when the hammer spring preload stays the same. There might...

My recent experience was that, when going out into the cold (low 30's F or lower) from room temperature, the plenum pressure went UP while shooting. Apparently, when my AMP regulator gets cold it doesn't shut off the flow of air to the plenum as easily as when it's warm. The increased plenum...

After my last post, I started wondering if my pressure gauge is giving me a different reading in warm vs cold temps. It's a wika 28mm 0-250 bar gauge for the plenum pressure. Hmmm... Thinking... I don't know. stovepipe

Hi Patrick1. I notice that you have not mentioned anything about changes in plenum pressure. Are we to assume that the plenum pressure is the same for every shot you take? What are your observations about plenum pressure in warm vs cold temps? Without knowing this, observations about muzzle...

With a 500mm barrel and a 580cc tank, there won't be much/any clearance for a moderator. You would need to find a moderator that is about the same diameter as the barrel shroud. I figure you already knew this or are not going to use a moderator (not everyone needs one). I just wanted to make...

Hi alcuerna. You have an air gauge to tell you what the air pressure is in the plenum, right? From what I've read, you haven't said anything about your plenum pressure other than you set it to 105 bar. It would help if you would write down the indicated plenum pressure immediately before each...

I don't have to own the 20-position wheel to tell you that it will have all the same downsides as the original fx powerwheel. Phil's micrometer is the only upgrade to the fx power wheel worth doing -- and it does it right. I was concerned about the micrometer's thimbal accidentally moving, but...

The specific camera sensors used and the "amplification" circuitry will play such a large role in "light sensitivity" that I would not assume anything based on magnification alone. stovepipe

Hi herryer223. I noticed in the picture of your maverick that you are still using grub screws in the "hand" that holds it to the cocking rod. ALL maverick owners should replace the grub screws with cap-head machine screws. Cap-head screws will use the full length of the threads in the "hand"...

I ditched the 2nd reg the same way you did -- just replaced the tube section that has the 2nd reg with a stock plenum section. That was about a year and a half ago. I still smile every time I look at where the 2nd reg USED to be :) stovepipe

I imagine if someone recorded the sound of a regulator cycle -- like with a direct to metal high-sensitivity and high dynamic range microphone recorded at 192K samples per second and 32-bits per sample (typical digital audio workstation setup on a home computer) and worked some audio magic on...

I understand your observations and your question. I've thought about this stuff many times when trying to think of a regulator design that would very quickly refresh the plenum and then just slam shut. I'm only familiar with the type of regulator you described -- the type that fills the plenum...

It's funny that in my last post I said my Mav hasn't leaked since I greased up the regulator like a trailer hitch (silicone grease), and this morning I discover that I have a slow leak. Oh well, at least it's a SLOW leak -- doesn't keep me from using it. So now I'm looking at rebuilding my...

I understand. The Mav is the only PCP rifle I own and have ever owned. I have a 3-D image of the AMP regulator permanently engrained in my head. So you use Mobile 1 oil, or are you talking about the grease (the red stuff)? I think the thing that kills the little o-rings on the set screw...

Thanks for your input here HogKiller. That clears up the question of "Should I let silicone oil get into my Maverick's air chambers?". At least it clears it up for me. I won't be doing that. I've never used silicone oil on my Mav. I do like the general idea of being able to put a drop of...

Two guys on this thread, so far, advocate putting a drop of silicone oil on the fill port before topping off your Maverick with air. Neither one of them has specified exactly what silicone oil product they use. To me it sounds like advice that should be avoided -- at least until a specific...

I guess I got a bit lucky with the scrap rate -- broke a few using oil, but none with the roll-on method. The frustration rate for me goes up to 100% as soon as I realize I'm about to play with tiny o-rings :) stovepipe

There are LOTS of silicone oil products -- some thicker than others, some with PTFE in them, etc., etc. EXACTLY which silicone product do you recommend for putting on the fill port before airing up the gun? stovepipe

The easiest time I had getting the little N90's to go onto the set screw was by actually making sure the set screw and the o-rings and my hands were completely clean and dry. I put the set screw into the housing upside down onto the table top like you did. Then position the o-ring perfectly...