Beni Maximus Euro .177.

[Ribbonstone]

Looking over notes from two Discos tuned down to about 12 foot pounds and a Challenger tuned up to about 12 foot pounds, the 65 shots can be had (and inside of 4% total velocity spread) without even getting "freakishly" efficient.  Can't speak to accuracy, that's dependent on the barrel, but the power plant should be able to get to that shot count without anything drastic being done.

[Monkeydad1969]

What is the thread size on the end of the barrel?

Standard 1/2" x 20 AFAIK.

Maybe MonkeyDad could confirm?

1/2" UNF

[Monkeydad1969]

Also...sorry, I did not chrony tonight.  My wife was rear-ended, so I will have to do the numbers this weekend.

Joe

[AmBraCol]

Also...sorry, I did not chrony tonight.  My wife was rear-ended, so I will have to do the numbers this weekend.

Joe

 

First things, first.  I hope she's alright.

[Bicycleman]

  My wife was rear-ended,
OUCH!

[StevenG]

"Also, don't think it's 12fpe.  Seems to be hitting a little hard.  I will chrony tomorrow."
That's the main reason why it's the Euro version. To comply with European 12 FPE power limits!
From the Crosman site  "Shot count in a PCP has a new name: Maximus Euro. Tuned to the European 12 foot pound standard (800 FPS), the Maximus Euro delivers up to an astounding 65 shots per fill!"

European limits? I think you mean English. The German limit is 5.5 fpe. The French limit is 14 fpe. The Netherlands has no fpe limits since 1997.

The Euro in this instance is simply a matter of branding with a nice story. There is no uniform European airgun power limit. It would in no way surprise me if these guns are a little faster.

[56S]

Yes, the prefix Euro is a popular marketing buzzword.  They could have added turbo, low carb and anti-oxidant in the name too.

[StevenG]

Yes, the prefix Euro is a popular marketing buzzword.  They could have added turbo, low carb and anti-oxidant in the name too.

I bet it is gluten free too!

[Bicycleman]

And don't forget "All Natural" and "Organic"!

[Ribbonstone]

Yeah...it's a Buzz word....but aren't all of Crsman's names kind of "buzzy".  "Maximus"...really?

Airunners with longer meonories may remember that this isn't Crosman's first try and that those threaded longer barrels have been seen before.

When the Discovery was new, they did try and sell them in the UK.  Had several strikes against them, not the least of which was the price there, which while towards the UK low end, not nearly as cheap as you'd suspect. Was selling for about 250 pounds in the UK...don't know the exchange rate of the time but it seemed a pretty heavy increase.

Crosman did sell a few of those barrels here in the US as parts, but for various reasons of the time, only a few as "over runs" and then stopped.

The ultimate restrictor of the system is the transfer port.  Make it really tiny (like .045-.05") as they do on the Challenger, and you'll not get over 6 foot pounds.   MAke it .125" and you'll be at standard US disco size.  Likely the Maximus has something about .

Posters are likely right, doesn't have to be exactly sub 12 foot pounds here in the US as there isn't any leagal restriction.

This shot count pretty much stayed in the 3% range (lets say +/-10 fps) wouldn't have passed in a STRICT UK test as one shot did manage to break 12 foot pounds (like 12.02).



We'd not sweat 2/100ths of a foot pound...but given an angry anti-airgun inspector (on a bad Monday..after his wife left him...and his cat died)?

NO...I'm betting it would need to be something nearer the 11 foot pound range to come close to the 65 shots quoted in the ads (at least unadjusted/as-issued).

[StevenG]

But are they free range?

[Dairyboy]

Yes, the prefix Euro is a popular marketing buzzword.  They could have added turbo, low carb and anti-oxidant in the name too.

I bet it is gluten free too!

Gluten free is a life saver to some of us who get really sick from it. But believe me if I didn't I would be all over it!

I'm not surprised if an air gun isn't shooting the fps promised just shocked it's more than what's promised as it's usually less.

[AmBraCol]

And don't forget "All Natural" and "Organic"!

Not in this case... it's got the synthetic stock.   

[Monkeydad1969]

So, here are some numbers I got the other night.  I was shooting the Ruger pellets from Wally World.  They are 8gr and were just right for my chrony testing.

Created: 09-22-2016 20:51:21
Description: .177 Maximus Euro
Notes 1: 2kpsi
Notes 2: Ruger HP .52g (8gr)
Distance to Chrono (FT): 20.00
Ballistic Coefficient: 1.000
Bullet Weight (gr): 8.000
Altitude (FT): 5280.0
Temp: N/A
BP: N/A
Shots
#     FPS        FT-LBS     PF
70    571        5.79       4.57     
69    580        5.98       4.64     
68    590        6.18       4.72     
67    599        6.37       4.79     
66    607        6.55       4.86     
65    615        6.72       4.92     
64    614        6.70       4.91     
63    627        6.98       5.02     
62    636        7.19       5.09     
61    642        7.32       5.14     
60    651        7.53       5.21     
59    651        7.53       5.21     
58    658        7.69       5.26     
57    667        7.90       5.34     
56    668        7.93       5.34     
55    674        8.07       5.39     
54    677        8.14       5.42     
53    679        8.19       5.43     
52    694        8.56       5.55     
51    696        8.61       5.57     
50    694        8.56       5.55     
49    701        8.73       5.61     
48    706        8.86       5.65     
47    710        8.96       5.68     
46    712        9.01       5.70     
45    716        9.11       5.73     
44    722        9.26       5.78     
43    718        9.16       5.74     
42    730        9.47       5.84     
41    736        9.62       5.89     
40    732        9.52       5.86     
39    735        9.60       5.88     
38    734        9.57       5.87     
37    740        9.73       5.92     
36    745        9.86       5.96     
35    752        10.05      6.02     
34    751        10.02      6.01     
33    754        10.10      6.03     
32    755        10.13      6.04     
31    749        9.97       5.99     
30    758        10.21      6.06     
29    763        10.34      6.10     
28    760        10.26      6.08     
27    759        10.24      6.07     
26    763        10.34      6.10     
25    766        10.42      6.13     
24    760        10.26      6.08     
23    771        10.56      6.17     
22    766        10.42      6.13     
21    769        10.51      6.15     
20    766        10.42      6.13     
19    770        10.53      6.16     
18    762        10.32      6.10     
17    767        10.45      6.14     
16    762        10.32      6.10     
15    762        10.32      6.10     
14    764        10.37      6.11     
13    763        10.34      6.10     
12    774        10.64      6.19     
11    770        10.53      6.16     
10    766        10.42      6.13     
9     761        10.29      6.09     
8     772        10.59      6.18     
7     768        10.48      6.14     
6     771        10.56      6.17     
5     770        10.53      6.16     
4     763        10.34      6.10     
3     760        10.26      6.08     
2     770        10.53      6.16     
1     770        10.53      6.16     
Average: 719.34
StdDev: 57.39
Min: 571
Max: 774
Spread: 203
True MV: 720.98
Shots/sec: 0.03
Group Size (IN): 0.00

I cleaned the barrel earlier this week and it was dirty, but the accuracy went south.  It now hates anything domed from Crosman and Benji.  But shoots softer lead HP's like a champ.  It does seem to prefer most JSB offerings, too.

[nervoustrigger]

Hmm, so the 2k fill starts at the top of the bell curve.  Before doing anything more invasive, I would try clipping a coil or two from the hammer spring and try to get a more useful bell curve.  Can always shim it back a smidge if you clip off a little too much.

Or of course if you plan to anchor the valve and fill to a higher pressure, that would be another way of approaching it.

[Doug Wall]

Hmm, so the 2k fill starts at the top of the bell curve.  Before doing anything more invasive, I would try clipping a coil or two from the hammer spring and try to get a more useful bell curve.  Can always shim it back a smidge if you clip off a little too much.

Or of course if you plan to anchor the valve and fill to a higher pressure, that would be another way of approaching it.

Before clipping coils off the spring, please post the spring size. My regular Maximus had a 0.045" spring, 1.5" x 0.30". There was NO preload. If you were to clip a couple of coils off of that, you would end up with a free flight hammer, with a very large amount of free flight. It might not even have enough left to open the valve.

[nervoustrigger]

Good point.  If the length of the spring is already very near a no-preload condition, another approach may be more suitable.   Such as perhaps a spring made of lighter wire, although if memory serves there is a big step down from 0.045" / 0.047" so that may not be feasible.  Or a lighter hammer.  Though pretty soon it seems like a basic SSG arrangement may be a similar effort.

[Dairyboy]

Joe has quite a few discos/similar creations I'm sure he can find a spare spring to try out somewhere with an RVA

[wll2506]

So, here are some numbers I got the other night.  I was shooting the Ruger pellets from Wally World.  They are 8gr and were just right for my chrony testing.

Created: 09-22-2016 20:51:21
Description: .177 Maximus Euro
Notes 1: 2kpsi
Notes 2: Ruger HP .52g (8gr)
Distance to Chrono (FT): 20.00
Ballistic Coefficient: 1.000
Bullet Weight (gr): 8.000
Altitude (FT): 5280.0
Temp: N/A     
Average: 719.34
StdDev: 57.39
Min: 571
Max: 774
Spread: 203
True MV: 720.98
Shots/sec: 0.03
Group Size (IN): 0.00

.

I doubt that pellet has a better BC then my 39gr .25 cal  swaged bullet .. ;-  )

wll2506

[Monkeydad1969]

BC is not correct for the pellet.  I didn't input for that.  So you're probably right.  So now, you can send me some of your swaged bullets for me to shoot in my .25's.