LW/.22 vs. LW/.177 accuracy at 70+



Author Topic: LW/.22 vs. LW/.177 accuracy at 70+  (Read 521 times))

Offline skorec

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LW/.22 vs. LW/.177 accuracy at 70+
« on: July 22, 2018, 01:29:43 AM »
After CF/stiffening the .177 LW   barrel I have  reached  acceptable long range  accuracy also for  .177 calibre.  One from three -  five shoot groups is 1MOA.
BC coefficient for  Monster Redesigned .177 is better than  for Heavy .22 and power is comparable.
Disadvantage only is higher shooting air pressure  requirement ( .22/160bar  177/190bar )
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AA S510 Carbine .177+ Delta Optical Titanium 6-24X42 AO,
Combo (CO2 and PCP ) QB78D .177 + Hawke Vantage 4-12x40 AO,
moded Noblesse Bullpup.22 + Hawke 8-32x56 SF Half MilDot , moded Puncher .177 + Hawke Sidewinder 30SF

Offline plinker81366

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Re: LW/.22 vs. LW/.177 accuracy at 70+
« Reply #1 on: July 22, 2018, 03:03:50 AM »
both barrels same goove specs?
good shooting btw

Offline skorec

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Re: LW/.22 vs. LW/.177 accuracy at 70+
« Reply #2 on: July 22, 2018, 03:06:55 AM »
both barrels same goove specs?
good shooting btw

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AA S510 Carbine .177+ Delta Optical Titanium 6-24X42 AO,
Combo (CO2 and PCP ) QB78D .177 + Hawke Vantage 4-12x40 AO,
moded Noblesse Bullpup.22 + Hawke 8-32x56 SF Half MilDot , moded Puncher .177 + Hawke Sidewinder 30SF

Offline rgb1

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Re: LW/.22 vs. LW/.177 accuracy at 70+
« Reply #3 on: July 22, 2018, 08:47:25 AM »
Peter, you are still getting a fair amount of spiral with the .177's.
In order to make it more evident, change your target material
from paper to thin cardboard.......an example is the box from an
automotive oil filter. It will mark more clearly, especially if it
is also backed with ordinary corrugated cardboard.
Based on your progress, I'm about ready to try the redesigned version.

                                                                    Ron
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Offline skorec

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Re: LW/.22 vs. LW/.177 accuracy at 70+
« Reply #4 on: July 24, 2018, 10:19:52 PM »
 Thanks Ron,
YES, some holes in the target seems to be not totally symmetrical.
l  have to taste them again whit  the cardboard and also at different  velocities . 
JSB heavy I was shooting from the same   barrel in to the thick   cardboard   and I  may see any asymmetrical holes at the target.

I seriously not understand at all   why CF stiffening of barrel  may act so huge  inaccuracy .
https://www.gatewaytoairguns.org/GTA/index.php?action=dlattach;topic=137985.0;attach=235215;image

« Last Edit: July 24, 2018, 10:22:36 PM by skorec »
  • EU, Slovakia
AA S510 Carbine .177+ Delta Optical Titanium 6-24X42 AO,
Combo (CO2 and PCP ) QB78D .177 + Hawke Vantage 4-12x40 AO,
moded Noblesse Bullpup.22 + Hawke 8-32x56 SF Half MilDot , moded Puncher .177 + Hawke Sidewinder 30SF

Offline Motorhead

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Re: LW/.22 vs. LW/.177 accuracy at 70+
« Reply #5 on: July 25, 2018, 01:09:07 AM »
Thanks Ron,
YES, some holes in the target seems to be not totally symmetrical.
l  have to taste them again whit  the cardboard and also at different  velocities . 
JSB heavy I was shooting from the same   barrel in to the thick   cardboard   and I  may see any asymmetrical holes at the target.

I seriously not understand at all   why CF stiffening of barrel  may act so huge  inaccuracy .
https://www.gatewaytoairguns.org/GTA/index.php?action=dlattach;topic=137985.0;attach=235215;image


Different barrel harmonics .... Just like a CF fishing rod ... it vibrates !!
You can gain stiffness with CF sleeving, but you also need to play with weights / ldc or moderators to change at what frequency the shot vibrations make the barrel move and adjust said weight accordingly.
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Offline skorec

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Re: LW/.22 vs. LW/.177 accuracy at 70+
« Reply #6 on: July 27, 2018, 12:58:24 PM »
OK I will taste some additional weights  . For now the .177 Monsters REDESIGNED are acceptable for me.
  • EU, Slovakia
AA S510 Carbine .177+ Delta Optical Titanium 6-24X42 AO,
Combo (CO2 and PCP ) QB78D .177 + Hawke Vantage 4-12x40 AO,
moded Noblesse Bullpup.22 + Hawke 8-32x56 SF Half MilDot , moded Puncher .177 + Hawke Sidewinder 30SF

Offline skorec

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Re: LW/.22 vs. LW/.177 accuracy at 70+
« Reply #7 on: August 15, 2018, 02:30:25 AM »
Thanks Ron,
YES, some holes in the target seems to be not totally symmetrical.
l  have to taste them again whit  the cardboard and also at different  velocities . 
JSB heavy I was shooting from the same   barrel in to the thick   cardboard   and I  may see any asymmetrical holes at the target.

I seriously not understand at all   why CF stiffening of barrel  may act so huge  inaccuracy .
https://www.gatewaytoairguns.org/GTA/index.php?action=dlattach;topic=137985.0;attach=235215;image

It was only moderator issue. Plastic filling was distorted. 
  • EU, Slovakia
AA S510 Carbine .177+ Delta Optical Titanium 6-24X42 AO,
Combo (CO2 and PCP ) QB78D .177 + Hawke Vantage 4-12x40 AO,
moded Noblesse Bullpup.22 + Hawke 8-32x56 SF Half MilDot , moded Puncher .177 + Hawke Sidewinder 30SF

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