FX A question for FX experts about the tungsten hammer in M3

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markovic79 said:
Any chance shooting pellets in .25 with a tungsten hammer and 140 bar on 1 power wheel??? 700 mm barrel.
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Jump to the 34 gr pellets and you should be able to get them up to speed with out a problem I like to stay around 900 fps with them but I would go to 150 on the reg and turn in the valve control to shave off the last little bit of speed to help balance it out some
 
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Airgunmann said:
You might be surprised as far as shot count goes a shorter burst of higher pressure seems like the impacts do better that way instead of the lower reg setting where the dwell is longer or valve stays open longer
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As for the high pressure and small hammer, the number of shots is good but the consistency is bad. With my wildcat, it varies by 30 fps... Consistency is important to me, so the only solution is the max speed for a certain pressure and lowering the hammer a little lower by 10 fps...
 
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I also don't understand the statement that tungsten is too heavy for everything below 150 bar. So if I set the wheel to 1, is it too heavy? I consciously lose the highest settings, but also with the factory hammer I lose the lowest settings. I probably won't be able to shoot Exact 1.645 but with the factory hammer I won't be able to shoot 41 grains and over... I'm talking about .25..
 
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Airgunmann said:
You might be surprised as far as shot count goes a shorter burst of higher pressure seems like the impacts do better that way instead of the lower reg setting where the dwell is longer or valve stays open longer
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The dwell of the valve needs to match the length of the barrel, too short of dwell lowers velocity potential, too much waste air and effects accuracy do to excessive muzzle blast. Harmony is what we strive for. Heavier (tungsten) hammers are better suited for longer barrels 700 +. If you max out your hammer and keep- adjusting down hammer tension with no velocity change, the amount of adjustment where significant velocity drops off is where your max setting is. Everything above that is wasted adjustment space on the high end.
 
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Mufasa said:
What if you use very little hammer spring? Physics says velocity is displacement or how far an object moves, divided by time. If you make the hammer spring less, the time for it to travel will be longer. Thus since the denominator is getting larger, then the velocity will be slower.

Basically what I’m saying is…go to 135 bar, and use a lower hammer spring setting with the tungsten hammer. It would be like using a heavier pellet and shooting it at 600 fps. Versus shooting a lighter one at 800 FPS. Same energy output, one is just heavier.

This way I can keep the tungsten hammer, and then go up in power if need be.

Would it not be the same concept?
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The problem with that is increased lock time.
 
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Just decided to install the Tungsten Hammer on my M3 700mm .25cal. I bought this well over a year ago but had been pretty happy with the results so never bothered fitting until now.

With the standard Hammer and 1x washer 6.51g it could send a 41gr Zan at 1005fps. The Reg is currently set at 167bar but if I remember it could still reach this same 1005fps at 155bar. I increased the Reg to 167 in hope to obtain more speed. The Hammer was completelyl maxed out. Valve: 1 turn past line 4 so absolutely fully open.

Now with the same settings and Tungsten Hammer and no washer installed it can only send the 41gr at 952fps, it also makes a horrible twang! Again Hammer is completely maxed out, anymore and it doesn't cock due to coil bind and sear not engaging.

I was expecting to get a higher FPS after fitting the Tungsten Hammer, maybe up as high as 1050fps ????

I note the shoulder on the Tungsten Hammer is quite a bit deeper than the standard hammer, thus the hammer spring is going to have more pretension and bind up sooner.

At this point I'm wondering what is the point of the Tungsten Hammer at all ?
 
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Kiteboardkid said:
Just decided to install the Tungsten Hammer on my M3 700mm .25cal. I bought this well over a year ago but had been pretty happy with the results so never bothered fitting until now.

With the standard Hammer and 1x washer 6.51g it could send a 41gr Zan at 1005fps. The Reg is currently set at 167bar but if I remember it could still reach this same 1005fps at 155bar. I increased the Reg to 167 in hope to obtain more speed. The Hammer was completelyl maxed out. Valve: 1 turn past line 4 so absolutely fully open.

Now with the same settings and Tungsten Hammer and no washer installed it can only send the 41gr at 952fps, it also makes a horrible twang! Again Hammer is completely maxed out, anymore and it doesn't cock due to coil bind and sear not engaging.

I was expecting to get a higher FPS after fitting the Tungsten Hammer, maybe up as high as 1050fps ????

I note the shoulder on the Tungsten Hammer is quite a bit deeper than the standard hammer, thus the hammer spring is going to have more pretension and bind up sooner.

At this point I'm wondering what is the point of the Tungsten Hammer at all ?
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Hello, I would suggest reading through this thread again. You now likely have too much hammer strike, start your testing at a lower hammer setting and find the velocity peak if you even can. We found the lowest hammer preload setting was just able to control fps at about 170-180Bar.
 
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Read through again and also watched Moose's video. I have just upped the reg (Huma Air gen 3) to 188bar (front reg deleted) and set hammer to max out on Macro 16, then started back from Macro 1 recording all speeds up to 16. Macro 1 = 745fps Macro 16 = 945fps

I was achieving higher fps, 1005fps (41gr Zan) with standard hammer + 1 washer 6.5g at 155 bar! So upping the reg another 21bar to 188 made no difference. I could go on and max out the huma reg to 200bar but I don't see this is going to gain anymore speed.
I cannot see where the Tungsten hammer is needed ? Maybe in .22cal it helps but doesn't seem to in .25cal.
 
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You could try drilling out a larger hole in the head of the tungsten hammer to reduce weight.
Also, try sanding the head of the hammer to reduce the depth which will reduce spring load.

10 grammes is a good balance.

The brass hammers tend to produce glitter after a prolonged use which isn't good for the o rings.

Hope this helps
 
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Kiteboardkid said:
Read through again and also watched Moose's video. I have just upped the reg (Huma Air gen 3) to 188bar (front reg deleted) and set hammer to max out on Macro 16, then started back from Macro 1 recording all speeds up to 16. Macro 1 = 745fps Macro 16 = 945fps

I was achieving higher fps, 1005fps (41gr Zan) with standard hammer + 1 washer 6.5g at 155 bar! So upping the reg another 21bar to 188 made no difference. I could go on and max out the huma reg to 200bar but I don't see this is going to gain anymore speed.
I cannot see where the Tungsten hammer is needed ? Maybe in .22cal it helps but doesn't seem to in .25cal.
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Ok update... The lighter Valve spring and rubber ball you get with the Slug Power kit, which until yesterday I'd never tried, I did install yesterday when fitting the Tungsten hammer. I had the Valve set at what I thought would of been full opened at approx imaginary line 5. I have opened the Valve even more now to imaginary line 7.5 and power increased significantly! 1046fps with 41gr and 875fps with the Zan ELR 61.3gr.

It is very jumpy though and not nice to shoot!
Think I'll try an 8g hammer with a 4mm flange.

This is a very interesting vid by Phil...
 
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