My new FX Indy...

[Calbarry]

Are you extending the pump arm all the way out on each stroke? This is where you get maximum air. Half stroking will take you more pumps to fill

 

[airborne]

I am new to air gunning and BRS said makes sense. I found out the hard way that I bought too much gun too soon. I love the Regal I bought but I will be able to shoot it better 6 months from now which makes me more excited. Air gunning is a whole different ball game, I am finding this out. Lots of time and money go into the hobby, so be prepared for that scenario also

 

[kmd1984]

KMD - Your Indy has a unique selling point (PCP shooting-like for a pump-up rifle), that presumably is the reason you choose it (it's certainly the reason for its design - for those who are many,many miles from an air bottle filling facility ie: some or many parts of the USA). Which is great, nice to see airgun makers thinking of that market. You say it is very accurate, again that's great.

True. The build in pump is unique. You are probably right when you say that the [build-in] pump was the reason that made me buy it. I was probably thinking, "Great! A build-in pump! I can now go anywhere I want, and never run out of air! EVER!" Only problem is, where the heck do I ever go, that does not allow me to take a hand pump or tank? No where. 

Unless you are a hunter, that disappears for days on end in the woods, shooting more than a 100 rounds, there is no need to have a gun with a build in pump, and I believe that many people just get "sucked" into thinking, that having a build in pump will "set you free". You still have to pump. No matter what.

You selected the Big Bore version (.25") with that comes some trade-offs re. number of refill pumps (more needed).
The 'air use effiency' of air rifles seems to peak at @.22" then will fall off massively with the larger cailbres (IMO) - possibly why the Old World airgun makers centred on .177 and .22 in their production lines...until recently?

I can see that...

Your highly accurate rifle does not carry a Regulator (it should not need one as the user can 'act' as the reg. in his pumping method). You teach your self how to acheive the best results (number of pumps / shots) to get an even spread. Airguns without Regulators typically show a Bell Curve 'power' output curve (to describe this: low at first, then rising as the air pressure is diminshed to the point where the valving works optimally, then falling off as the air pressure declines below that to operate the valving 'optimally).
Here's the point -  the middle area between the 2 extremes is where you'll find the best power spread (most even spread). that area is called the 'plateau'

Thanks for explaining, but it wont matter at this point anymore. I just sent my Indy back. I was going to wait for the Impact instead, but I keep reading about issues people have with it, so I am having second thoughts on it. 

What Kris said is correct - You can fill up to the max but your most useful set of shots will be within approx. 185 - 120 BAR, keep the gun within those (more correctly, YOUR chosen zone) and you will have an extraordinary rifle.

Well, good to know. Who knows, maybe one day I will end up with an Indy again. : )

Thanks,

Kmd

 

[kmd1984]

"AirgunBill"

"kmd1984"

"zebra"Your pumping technique could be part of it. I have never used an Indy but with regular pumps, you need to wait for a second or two at the top and bottom of each stroke to let the cylinder fill with air. I thought of that when you mentioned feeling a vacuum on the upward stroke with your Benjamin pump. Not waiting would create that feeling. I have no idea if the Indy mini cylinder works the same as an hpa pump but can't hurt to try.

What?! I have never heard this before in my life, that one has to wait when using a pump? I might be new to PCP air guns, but I am not new to pumps. I never ever had to wait for a pump to fill up with air?! Can anyone confirm this? Besides, I was using the pump exactly the same way when it started to create that vacuum feeling, as I was before and I never had that vacuum effect...


Thanks,

Kmd

I know with the hand pump a momentary hesitation at the top and bottom of the pump stroke allows the air to flow through the small orifice into the air tank. I would think the same might apply to an on board pump system like the Indy. Watch this video where a slow deliberate pumping technique is used. Bill

Sorry, I am not buying it. Why would every engineer out there, that designs pcp hand pumps, choose to design a pump where the intake is too small, so you have to take a break on the end of each stroke? Sound pretty stupid to me. Just saying. 

 

[BRS]

KMD

That's your choice of outcome,

not entirely based on facts IMO.

But you made it, so...

 

[kmd1984]

"BRS"KMD

That's your choice of outcome,

not entirely based on facts IMO.

But you made it, so...

Well, I watched the video, and I did not see the old man base his opinion on facts either. I have no idea who he is, but I guess whatever he says is "official"?!

That said, I used my Indy pump in two ways. One was all the way in both directions, and the other was stopping short at both ends. I did see ZERO difference in outcome. That to me is fact enough. 

Just so you know, I tried the "not all the way at the ends" method, because I found it annoying that on the bottom stroke, the one where the handle folds against the rifle, your fingers would be in the way. You cannot "hold" the lever in your hand, rather than push it against the rifle... that made it awkward to then "grab" it again.

Anyhow, I do not have a pump here today, it is coming on Friday. Once I get it, I will see if I can get some scientific "tests" done, trying to figure out if it does make a "real life" (for the lack of a better word. English is not my first language) difference. 

thanks,

Kmd

p.s. Think about it though. Why would anyone design a pump where you have wait at the end of each stroke, so it can "fill" with air???