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

[CarsonRatSniper]

Shrouds & LDC's will be finished next week sometime...the monocores still need a couple small slots milled at the front bt *look* at that thing!




Mike

[MRT949]

Do the monocores get covered ?
This is new to me air gunning .

[CarsonRatSniper]

Yes, there's a .002" slip fit between the Monocore & the carbon fiber tube that slides over it...those expansion chambers are huge!

Mike

[MRT949]

Will you monocore work on a P.B. 

[CarsonRatSniper]

They're laser engraved *For Airgun Use Only*

All I'll say is the design is extremely stout.

Mike

[MRT949]

Airgun only is good .

[CarsonRatSniper]

Here's a shot string Jeremy did today...the group is at 53 yards. No pumping between shots.





Mike

[c670809]

Looks great.

How is the assembly going?

[MRT949]

Impressive

[CarsonRatSniper]

Looks great.

How is the assembly going?

It's going good - It's been slow due to machining little parts as I go for each rifle...teflon check pin seal, stainless breech guide pin, shortening the hardened link pin from Mac 1, making stainless pivot pins, fitting and checking each magazine for fit & function. The magazines, while machined, still require about 40 minutes of hand finishing for deburring & smoothing out all sharp corners.
Then I still have to assemble the rifle, locate the pump arm holes for the forearm, disassemble the rifle, drill & tap, then reassemble.
It's the final fitting that takes quite a bit of time, but I'm doing about 1 rifle a day.

I have 5 rifles left to assemble.

Mike

[MRT949]

Assembly time on the first run always takes longer.
It's a learning curve .
Once you have everything in place.
It get's easier I know by experience .

[jvanschoonhoven]

To comment on the monocore and powder burners these are designed only for air gun use and the threads are different then that used on powder burners. If someone gets the bright idea of trying one of these on a powder burner there is a good chance it will rip apart and casue serous injury and it is a federal cirm with 10 years in prison.
 If you make or posess some kind of adaptor to make an airgun ldc mount to a pb then the adaptor will be considered an illegal item.
   

[CarsonRatSniper]

To comment on the monocore and powder burners these are designed only for air gun use and the threads are different then that used on powder burners. If someone gets the bright idea of trying one of these on a powder burner there is a good chance it will rip apart and casue serous injury and it is a federal cirm with 10 years in prison.
 If you make or posess some kind of adaptor to make an airgun ldc mount to a pb then the adaptor will be considered an illegal item.
 

I'd also like to add they are designed to slow the flow of *air* which has started at a given pressure and is decreasing in value - They are *not* designed to slow down the flow of hot, expanding gasses from a firearm.
That is why the chambers are so large.

I work in a prison...you guys don't want to live in one.

Mike

[jvanschoonhoven]

Just an update been shooting my rifle quite a bit and am shooting 25.4gr jsb pellets through it and spent a few hours yesterday trying different hammer spring adjustments and different fills as you can see my most consistent shots came in right around 800fps this is on a 1900 psi fill. With a 2000 psi fill I could get 850 to 860 fps for one shot then it dropped to about 800fps for the 2nd shot. Believe it or not there is a wide range of pressure on my rifle where I get the same POI at 50 yards. 1900 psi down to 1400 psi.
At 25 yards I can get 5 shots with less then half inch POI shift.

My rifle takes 17 to 19 pumps per shot depending on the pressure.

If you want to pump less per shot you can change the settings quickly to shoot at 650 or 700 and use about 10  to 12 pumps per shot.

I have my shroud on and it is only half built and even now it is super quiet. Shooting the gun is quieter then pumping it.

[c670809]

Mike,

Sounds like they are starting to come together. Thanks for the more in-depth update.

Looking forward to seeing them.

Thanks

[jvanschoonhoven]

With low pressure and at about 500fps this thing is super efficient. I have not dialed in the shot curve yet but 5 shots from 480fps to 550 climbing each shot with a 1000 psi fill. I wanted to shoot another mag but the rain hit right then.
Took me only 20 pumps to get back up to 1000psi  so this is an average of 13.8fpe! This is good enough for small game without blowing it apart.
I want to find a tune that I can quickly go to for low power after I have shot my 3 good shots at high power so I can get another 5 accurate shots. So much research to dig into the potential of this rifle.

[CarsonRatSniper]

My .30 cal does 585 fps on only 680 psi!

I will play around with every possible combination of tunes and post all of it as soon as I have time.

Mike

[MRT949]

Great report .

[MRT949]

What is the comparison of pumping effort compared to another rifle .

[jvanschoonhoven]

I would think its close to 8 to 10 pumps with the 392.
A young kid would have a tough time pumping to 1900 psi but could do 1400 to 1600 psi. You could tune the rifle to get 3 to 5 good shots at what ever pressure your comfortable pumping to.