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I said I'd release this in May last year, just never said which year. Maybe its 2022? I built this all in 3-4 months during the beginning of the pandemic, but have kind of slept on it for the last year due to burning out on it, it is/was quite overwhelming. Its 98% complete and fully in beta...

Time for the reveal of a few secrets. How to quickly find out how minor changes may effect your energy output in a traditional pcp. For these simple solutions, you need to know some of your rifles specs. ***Port size Increase/Decrease*** Port OD / Bore OD .2 / .25 = .8 What is your...

There are many ways to skin this cat. I recently decided to approach this modification for my marauder with two ideas in mine, external adjust-ability, and simple modification. As they say, KISS (keep it simple sillygoose). This mod can apply to any air gun that has a machinable hammer, and...

Port size and efficiency volume 2. What does Port size have to do with 2 milliseconds? Is this a punchline to a joke? Absolutely not. 2 Milliseconds is roughly the amount of time you have to expel as much air into an airguns barrel prior to the pellet out pacing any further air being...

Efficiency can be simplified by valve close time relative to pellet position in the barrel during the shot cycle. Simply put, valve dwell is one of the major variables in efficiency. With that, larger ports simply breathe better, the larger the port (up until a bit over bore size), the more...

Simple request, if you have what you consider a popular pellets for your caliber in your stash, and a micrometer, please take the time to measure and provide me with said data as I would like to include it in my upcoming sheet for those that don't have the means (micrometers :P ) or knowledge...

If you have a more common/popular air gun and the following data, please take the time to fill out as I'd like to include it in my upcoming spreadsheet. Only OEM data is needed right now, if you don't have OEM data (unmodified from manufacturer) then please don't proceed! This data may be used...

Simple PCP Calculator Mobile version Release. The simple mobile version includes: max fps based on gun/ammo parameters efficiency calculation (fpe/ci, and other air usage data including thermal efficiency) pressure gradient for tune and plateau comparison charts for changes in a...

I'm not a 'customer is always right' type of person, as I run my own business...but when I order something, twice, and between 4-8 weeks goes by without receiving anything, I simply start a case with paypal to protect my money, as I don't like to spend it on thin air...I inquired about...

Some may be aware of my formulations in regards to pcp's...I have tons, many of which I keep to myself, because I worked hard on them. This is one of my pride and joys, I feel it's time to share, for anyone interested, for anyone who builds pcp's, for anyone who has specific goals and wants...

Anyone with a FX Smooth twist X Pellet liner A in .22 cal know or can obtain the liners OD? Thanks! -Matt

Free flight / hammer gap is when there is a nominal distance (ideally at least 2/3 distance of valve lift) between the face of the hammer that strikes the valve stem when the rifle is left uncocked, and the valve stem itself. Why is it important to have this in place in modern pcp's you ask? To...

Thought I'd welcome those with powerful airguns and a deck of cards laying around to a test to see what it takes, or if its even possible, to shoot through an entire deck of playing cards (Calling all .452 slayer owners hah). My attempt was at a mere 56 muzzle FPE @ a safe distance of 10 yards...

Here is a graph demonstrating how plenum volume effects FPE output (In regulated rifles, non-regulated generally don't have this issue). This information is relatively universal in the fact that I think 1/3 cc plenum per FPE to 1 cc plenum per FPE is the most ideal range for a pcp. The lower in...

I decided to do a little test replicating a real world hunting condition to see how powerful a 60 fpe shot really was and how effective it may be taking down bigger (medium) game. For this test I used an old leather wallet to replicate the hide of a larger animal, and then 3/4" particle board...

My .25 cal is tuned to shoot around 56 FPE but I also shoot it at 60 fpe. I use a 9" thick box packed TIGHT with rubber mulch and frequently shake/flip it to keep things uniform inside. First pic shows the thickness in the direction I shoot. Second shows a few exit paths...luckily for me behind...

Gotta love 1 hole groups! No need to measure CTC :)

So I couldn't help but try again, this time the goal was as per the original goal I had, to keep the OEM seat intact and port the valve to 90% or greater. It was actually really easy...but I can only say that after failing and learning from the experience. My first step was to drill the...

I do a lot of modifications to PCP rifles. And the following I will be presenting to you should NOT BE ATTEMPTED unless you have thorough knowledge of how pcp's work, inside and out, but mostly inside. The following was done with VERY limited set of tools : drill, dremel, clamps, peek/delrin...

I was inspired quite some time ago to attempt this, by someone who said it couldn't be done using basic math. After reviewing this article written by Domingo Tavella (you can google it if you'd like, its very well written) I felt compelled to give it a shot. My interpretation of whats happening...