GTA

All Springer/NP/PCP Air Gun Discussion General => PCP/CO2/HPA Air Gun Gates "The Darkside" => Topic started by: skorec on July 22, 2018, 01:29:43 AM

Title: LW/.22 vs. LW/.177 accuracy at 70+
Post by: skorec 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 )

Title: Re: LW/.22 vs. LW/.177 accuracy at 70+
Post by: plinker81366 on July 22, 2018, 03:03:50 AM

both barrels same goove specs?
good shooting btw

Title: Re: LW/.22 vs. LW/.177 accuracy at 70+
Post by: skorec on July 22, 2018, 03:06:55 AM

Quote from: plinker81366 on July 22, 2018, 03:03:50 AM

both barrels same goove specs?
good shooting btw

YES

Title: Re: LW/.22 vs. LW/.177 accuracy at 70+
Post by: rgb1 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

Title: Re: LW/.22 vs. LW/.177 accuracy at 70+
Post by: skorec 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 (https://www.gatewaytoairguns.org/GTA/index.php?action=dlattach;topic=137985.0;attach=235215;image)

Title: Re: LW/.22 vs. LW/.177 accuracy at 70+
Post by: Motorhead on July 25, 2018, 01:09:07 AM

Quote from: skorec 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 (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.

Title: Re: LW/.22 vs. LW/.177 accuracy at 70+
Post by: skorec 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.

Title: Re: LW/.22 vs. LW/.177 accuracy at 70+
Post by: skorec on August 15, 2018, 02:30:25 AM

Quote from: skorec 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 (https://www.gatewaytoairguns.org/GTA/index.php?action=dlattach;topic=137985.0;attach=235215;image)

It was only moderator issue. Plastic filling was distorted.