Magnum Air Cartridge MAC Rifles
What do you say about this new rifle and cartridge system?
http://www.inovairtech.com/Tactical_Rifles_s/1861.htm
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Viewing 13 replies - 1 through 13 (of 13 total)
The pellets being used are a good quality pellet, the air pressure in each cartridge is very close.
If your shooting a bottle gun your pressure is not the same between each shot either.
At Inovairtech I do believe they are using an adjustable reg, but I can not afford one.
I do not believe that is the problem.
I have used different grain pellets to try to find the right combination, as I stated I am doing
more testing, we will see how things turn out.
They swapped the bolt not realizing that I had modified it. They are sending mine.
It looks to me like the problem is not the gun.. but a barrel that is craving for the right pellet or cast bullet in this case. Provided of course that much care is taken to fill the cartridge with exact same pressure each and every time. Hence, I suggested in an earlier post that a mechanical regulator of some sort be implemented during filling.
Hopefully the nincompoop that misplaced your bolt is being provided a more secure work space so he can rebuild trust in his career. 😳
Hey guys here are some findings
Average 5 shots per pellet grain:
grain, 3500psi, 4000psi
48 ,,,,, 790 ,,,, 819
55 ,,,,, 755 ,,,, 758
63 ,,,,, 706 ,,,, 725
70 ,,,,, 682 ,,,, 707
70HP ,, 654 ,,,, 705
83 ,,,,, 592 ,,,, 611
I have come to the conclusion that I will not be able to use this gun for benchrest
But I can say that at 100yds I can put all 25 rounds in a gallon milk jug. So yes the
milk jug is dead. But I have not been able to get down to putting all the rounds in
milk jugs cap.
They are releasing a gen5 MAC soon which will be more consistent and empty using
less hammer weight. Also in the works and in testing is a MAC that will Be less fussy
about air pressure.
When I fill I have to stop at the desired pressure, but a lot of the guys testing have
reg’s that can be set to 4000 or 4500 which is great for them as each cartridge will
have the same pressure, mine may very a small amount. But with that said when
shooting a bottle gun like my BR Condor .25 that tank as you know also changes pressure.
I know what pressure I need to fill it to so that my next 10 shots are at peek, so using a
5 spot target @ 50yds putting 5 rounds in the 10 spot is no problem. But wait the air pressure
was not the same fore each shot.
My point? Well I know the cartridges were filled close enough when I stopped 1 line over the 4000
mark. So shooting from the bench should be no problem, right?
The problem is as the cartridge is now they are to inconsistent. They are trying to work on the problem.
This is a test I did using 25 cartridges
This is using only 1 cartridge
I have just received the gun back and with testing the groups seem a little tighter, but I will have to wait for
the bolt that was in the gun when it was sent to them to be sent to me. My bolt had a longer spring which solved
A misfire problem and the bolt that is in the gun now is not my bolt and to many cartridges are not emptying
completely.
More testing needs to be done, I am not a hunter but I believe the gun could be used for hunting small game.
My fingers are crossed that the problems will be solved. As for a Benchrest gun I am now building a CondorSS
.257 with a 32″ TJ barrel and a Tank, Valve, Hammer and spring from Doug and Mad Dog Stock. It will be calibrated
for RJ-Porters pellets.
Now I will say this. I also have a mac35. Though not super powerful(100fpe) it is accurate with jsb pellets and my 100grn flat point bullets. With jsb it will cloverleaf 3 shots at 50yds. I just can’t figure out the problem with the cartridges for the 257. My friend has 20 of them. 5shots group good then 3 shots group good in a totally different area then 6 and so on. The 20 cartridges don’t have the same poi.
Thanks for the update rj-porter.
I am sure all guns are One Holers… as long as they fire just one shot..
The YellowForum simply removed my post there about these pretty but not accurate guns…. as you call them… fake bench guns. They make beautiful display pieces though.
I am wondering, perhaps if the cartridges are carefully filled with exactly the same pressure, isn’t that enough for consistent shots? Maybe that is the Achilles Heel of the design. I guess they should have a well regulated filling system, not just a visual on the pressure gauge to ensure constant pressure every time a cartridge is filled with air.
The problems with the 257 have been sorted out and fixed. There were bad springs in the cartridge s.
Yes it is sad.
I talked to a friend that knows the guy with the .257. He just got it back and it’s the same piece of junk it was when he sent it back to them. They main problem besides lack of fps is the consistency between cartridges. I guess almost every cartridge shoots a different fps.
They won’t refund his money so he’s stuck with a $1600 gun that looks cool but won’t shoot.
He won’t come out and say how bad it is either. So I’m saying what I know just to get the word out and a warning.
He is now building a .257 condor SS.
I held back on saying this out of good ethics but I think I can say it now. While the general population of airgun manufacturers draw potential customers with hyped ads of super velocities, I have always wondered why nothing was mentioned about the MAC Rifles velocities. Thanks for this revelation, I am learning things.
Yes, it rates high in the looks department.
However, the real airgunner will want something more than looks in a real airgun.
There is a guy with a .257 and it is barely in the 700’s. He has like 20 cartridges and only a few would shoot close to each other.
It looks cool is about it. Cartridge need to be 3 times at least. You need 1 cc per fpe.
Cartridges are to small. Also they are real inconsistent from cartridge to cartridge.
The theory of operation seems sound. But I have never seen posted shot strings and groups at particular ranges. Just a few videos at youtube.
It doesn’t work. Shoots way to slow.
Cartridges are to small. Also they are real inconsistent from cartridge to cartridge.
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Hey guys for an update we found that the problem was the springs in the cartridges.
The batch of cartridges we were doing our testing from had poorly heat treated springs.
This is a hard problem to find, but the guys at Inovairtech keep’t at it until the problem
was solved. I would venture to say the results are improving greatly. As this is a forum
for Airforce Airguns I have not posted my new findings here. So all in all the guns are
doing much better
So I am going to post my latest experience so look for the post called Inovairtech MAC30BR
Edit:
I just thought I might add that David P. at Inovairtech has really done his best to stay on top
of every problem, to get the gun to shoot the way it should. I think you would find that the
service is very one on one. He really seems to want you to have a gun that performs well.
Sure there were some problems, but they eventually got worked out. In my opinion
their new generation of guns are doing very well, and I am very happy with mine.
I also believe the cons I have been listing are all being adjusted in the newer models
and if I wanted one I am sure they would send me the new gen MAC30BR but I like mine.
So don’t be afraid to try the MAC’s.
Ken “Lighthorse”