GTA
All Springer/NP/PCP Air Gun Discussion General => Air Gun Gate => Topic started by: emi on March 15, 2011, 07:40:13 PM
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Since we have seen many 100m matchees and since we have improved our equipment, we had to come to the conclusion that the Lightstream HW100 is the best 100 rifle (indoors). The most important modification is the barrel. The origanal one really not worthy.
I'll tell you about the main modifications:
1. the barrel
this is replaced for a Lothar Walter polygon barrel in .22 600 mm long
just make a copy of the HW barrel bud make the edge on the back where the pellet enters the barrel 0.5 mm larger so the pellet can enter the barrel easier
2. Fixing the barrel in the breech block
For this there are 2 extra grubscrew’s m4 drilled in to the breech , the location of these screw’s is on top trough the dove tale 10 and 20 mm in front of the center of the transfer port hole to clamp extra on the barrel
3. Loading probe
This is made 2,4 mm longer by drilling a 2 mm hole in front of the tip and soldering a brass extension tip on it what fits in the hole and is as thick as the loadingprobe it self
And has a 2mm side that centers it in the probe
4. The barrelband
In the barrelband there are 4 grub screw’s these clamp the barrelband on to the cylinder
Fixing the barrelband to the cylinder this is done because the stock of the HW100 has the
intension to flex and by doing that the barrelband moves the barrel of its center
all so remove the o-ring that is in top of the barrelband so that the barrel becomes
free floating
5 The regulator
The regulator is turnt in to increase the pressure set it 0,25 mm deeper
6 The restrictor
on the valve stem there is a small bras restrictor this is replaced by a one that is tapered
on one side so the air can flow easier trough the valve
After these modifications set the power of the HW100 to 965 fps (jsb exact 15.9 grn) this will give 20 shot by a 200 bar filling 965 fps is what works best for a polygon barrel in .22
Results on 100m please see: http://www.100mairgun.nl/post/2011/03/Peter-wint-100m-wedstrijd-Dongen.aspx (http://www.100mairgun.nl/post/2011/03/Peter-wint-100m-wedstrijd-Dongen.aspx)
If you want such a gun, let me know. I'll do my best.
Thank you!
emi
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This is great info EMI. I wish I had a HW-100. I have shot them a couple times. Very nice match PCP. They are ove $1100.00 US here in the States. When you get tired of yours please pass her on to me...:)
I notice the pellet weight on the chart of the link you posted. Is that in gains or other measurment?
Thanks for sharing with us and your generouse offer.
Gene
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you are so lucky to get JSB 5.53mm pellets there. we can only get 5.52mm JSB pellets
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Wow....that's some serious air rifles and shooting.
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100m... and I think 30 yards is tough !!!!!! But it sure does sound like fun..... Mike
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Where do you shoot? Sounds like northern Europe?