Millennium Pumper Production - *The Beginning* - And The Lousy End

[rsterne]

not as far as I know, and no I have no idea how big the reservoir is on an Indy.... Let me ask you this.... what good does it do to pump a gun to 1800 psi and then regulate it at 1800 psi?.... Alternately, if you pump the gun to 1800 psi and regulate it to 1000, it will now shoot at the velocity it would shoot at 1000 psi, and for the number of shots that the reservoir can supply between 1800 and 1000, which with a small reservoir is very few.... You then need a second chamber (plenum) of about 1 cc per FPE between the regulator and the valve, which in this case would be the same size as the reservoir.... I don't see how to make a regulated PCP work with a small reservoir, but perhaps you know how?....

Bob

[Nomadic Pirate]

it seems pointless to regulate a gun that only has 2-3, maybe 4 shots.

you can control the spread just as well with a good tune

[Chako]

No i dont know how rsterne, i was just curious, now i understand.

[cclingma]

I found a graph of a .22 Discovery tune that showed at least 15 shots of 800fps for 22.6 fpe with 15.9gr pellets.  Noticed here from Bobs info that the Millennium will be 1/3 the volume of the Discovery.  So I'm thinking a full magazine (assuming they end up being 5 shot) at 22.6 fpe could be reasonable to expect before having to work the pump again.  For the areas I hunt that would make a very nice squirrel rifle.  Maybe I missed it or just can't remember, but were 5 shot mags the plan?

I think I'm obsessed with a tune that shoots a full mag with consistent velocity be it a 5,4 or 3 shot.

[CarsonRatSniper]

Yes, the mags will be 5 shot in .25 & .30 caliber...maybe 7 shot in .22 - we haven't gotten there yet. Those parts are happening later thus week, early next week.

Mike

[rsterne]

The more shots you take, the more you have to pump to top it up.... and it's not quite linear, the later shots take more pumps.... For example, when tuned for 3 shots of 40 FPE my Millennium Pumper took 11 pumps after 1 shot, 13 more for the next shot (total of 24) and 16 for the 3rd shot (total of 40) to get back to 1800 psi.... This is because the higher the pressure, the more efficient (and quieter) the shot.... When hunting, I would repump after each animal (unless you get a double), to both minimize the number of pumps, and to spread out the work.... Pumping 40 times and then seeing a squirrel right afterwards would be quite a challenge, I would think....

Bob

[NickB79]

Oh man, I might have to smash my daughter's piggy bank if I keep reading this thread.

[cclingma]

When hunting, I would repump after each animal (unless you get a double), to both minimize the number of pumps, and to spread out the work.... Pumping 40 times and then seeing a squirrel right afterwards would be quite a challenge, I would think....

Bob

Thanks for all your explanations and for sharing your experiences with your original pumper.  Thinking about operating as you say above by refilling after every shot helps me understand the folks looking for more powerful tunes.  Trying to shoot a full magazine before pumping may not be what I would try to do after all.

[rsterne]

Not necessarily after every shot, unless you manage perfect one-shot kills every time, and never get the opportunity of more than one target (I've shot as many as 4 Grouse in one covey with 5 shots, with a PCP).... However, when the flurry of activity has ended, and I'm putting the birds in the cooler, I take the time to reload the magazine and top off the gun with air (if necessary) before I continue my hunt.... Then you are always ready with a full mag and reservoir for the next round.... I do the same thing even if I only shot 1 shot (except for air on a PCP, I nearly always go the whole day on one fill).... With a pumper, I would pump before continuing my hunt.... The number of shots you need in the string depends on what might be your worst case scenario, hoping you never need that lower powered back-up shot.... or only for a "coup-de-gras"....

Bob

[CarsonRatSniper]

I've been in some target rich environments when I was carrying my Steroid 392 and wished I didnt have to pump 14 times between shots...then you find yourself pumping *enough* (7 or 8 ) so you can shoot again before the 2nd opportunity (or follow up shot) disappears.

I'm with Bob - pump up and top off the mag after each encounter.

I will have more production pics this Wednesday...

Mike

[cclingma]

Sounds great.  Can't wait to see the tuning results of all calibers.

[CarsonRatSniper]

A bit more progress on the breeches...the breech/tube band location has been machined and the barrel location drilled and threaded.




There are two .25 barrels and two .30 barrels that have been threaded into breeches but I didnt make it back to Jim's today to see them...I will post pics tomorrow.

Mike

[cclingma]

Nice!

So does the carbon sleeve of barrell go over that shoulder extending from breech or does it butt up against it?

[Nomadic Pirate]

Cool, so nice to see Weaver rails on Breeches, all companies should go that way

[Habanero69er]

Really nice looking work. I'm excited to see the final product. I'm interested in getting a .25 when they're done.

[CarsonRatSniper]

The breech band area is .750" OD - the CF sleeved barrels will be .750" OD as well.
The .30 cal barrel is .590" OD, the .25 barrel is .560" OD and the .22 barrel is .500" OD.
The sleeves will butt up against the breech face themselves (the CF sleeving will match the OD of the breech band knob) and the .22's sleeving will butt against the knob too.
The .30 & .25 barrels will get bushings then CF sleeving - the .22 barrel will get sleeved in .625" OD 6061 T6 aluminum, then sleeved again in CF.
The barrel hole in the breech is .500" in diameter.

That's a long explanation for *Yes, the barrels index against the breech knob*

Mike

[MRT949]

Looking Good

[cclingma]

That's a long explanation for *Yes, the barrels index against the breech knob*

That explanation works for me.  Interesting difference with the smaller diameter .22 being sleeved in both alluminum and carbon fiber.

[CarsonRatSniper]

I didn't want that much glue between the barrel and cf tube...so I had to build up the OD of the .22 barrel. There just happens to be aluminum tube that is .509" ID x .625" OD and the cf tube happens to be .625" ID x .750" OD.

[aom22]

not as far as I know, and no I have no idea how big the reservoir is on an Indy ....

The FX Independence - A first day Review (pic intensive)

The rifle can be manually pumped to 220 bar easily.
The onboard block is only 20 or 22cc approximately ....

FX Independence .22 Caliber

Here is a run through of how the FX Independence works: starting with a full charge, the rifle requires three easy pumps with the onboard pump for every shot taken.
The rifle can be fired up to 7 times at full power with match grade consistency before any pumping is required.
From this point, 21 pumps would be required to return the rifle to a full charge.