What is your routine to keep as consistent as possible?

[MathewC]

I have a PCP rifle and a hand pump. Obviously velocity starts to change over many shots, so I'm wondering, what is your routine to keep it as consistent as possible? I was thinking of pumping the gun up to it's limit, then use the chronograph to document 50 shots to see where the sweet spot is.

I've not been keeping track and I get sucked in and shoot a bunch then have to take a break to pump back up again...

 

[SDellinger]

If you shoot with a magazine just count the number it takes to get to the spot you need to pump up.

 

[MathewC]

Yes, but how did you determine how many? Just, chrono them? Test for accuracy?

 

[wolfmangreg]

Yes, but how did you determine how many? Just, chrono them? Test for accuracy?

Both, though I always start with a chronograph string from max pressure, down to the point it's obviously off the regulator (or out of the flat "sweet spot" of an unregulated rifle). Then test for accuracy at various points in the pressure curve. Often, you can squeeze out a handful of accurate shots after velocity starts declining noticeably (per the chrono), especially at shorter range. Not always though, especially if you're stretching the distance.

Example- had a Huntsman (regulated) that showed no measurable difference in point of impact (out to 30 yards) for 8-10 shots after pressure had clearly gone below the regulator setting. But at 50 yards, saw a noticeable drop within a few shots.

 

[MathewC]

Ahh okay. And I guess my next dumb question would be, since I've not looked at the market/changes in technology in a while, what is the most consistent mechanism/setup going now? FX M3?

 

[beerthief]

the given information is not gun specific . It is a way to get the answer you asked for

 

[MathewC]

the given information is not gun specific . It is a way to get the answer you asked for

I'm asking a different question now, which is, what is the most consistent mechanism on the market for delivering the same velocity shot per shot for longer shot strings.

 

[MathewC]

Yes, different manufacturers like Daystate and FX use different regulation methods with patents on different mechanism. So, I'm asking: "What's your opinion on the best technology/gun available today if accuracy/consistency/adjust-ability is the primary concern.

 

[dizzums]

mechanism? lol ... tether to a fill bottle using an external reg set to the lower end of the sweet spot determined by a chrono and accuracy test to find the 'dead nuts' pressure spot .. then surround yourself with about 20 filled mags and several tins of pellets, then bobs your uncle lol .. go to town with it for several thousand rounds or until your trigger finger gets a cramp, whichever comes first ..

 

[MathewC]

That's not a bad idea

Still the gun itself has to regulate the pressure for each shot.

 

[Emu]

From some years to now they are selling diverse rifles with integrated regulator.

That of your question is the work that the regulator achieves.

In the following threads is an explanation of how the regulator works:

Common error in conceptual functioning of a regulator.

There's a common error in thinking that the higher the regulator is set the harder the rifle will shoot. That is not the case. It is needed to understand that there are two forces in fight: the one of the preassure of the air in the plenum and the one of the hit of the hammer. The equilibrium...

www.airgunnation.com

 

[Jasonmc]

on my non regulated rifles... i use the chrony and find its sweet spot.. let's say the manufacture says fill it to 3000 and you will get 40 shots... with your chrony and some testing you may find your rifle likes a 2800 fill and it gives you 30 very consistent shots... once i know this... we'll i'll fill to 2800...count out 30 pellets and shoot...