My streamline .25 ( updated)

So all is well will the Sumo. I did a shot string when I got home tonight on medium power and there was no deviation in pellet placement. I guess I wasn't expecting a shift in POI between moderator on and off. Here is the results of my 9 shot group ( chrony registered error on 1 of the 10 shots)

Pellet: JSB 25.39gr
Chrony: Competition Electronics ProChrono w/ indoor lighting kit.
Target: 12 yards
Rifle: 220 bar by rifle gage.

672
670
675
672
673
668
669
670
671
Avg 671
ES 7
SD 2

 

As you see point of impact slightly low from center hold, but shows pellets all going into one hole. The cardboard backer better shows the one .25 hole, but too many other holes on it to take picture.

I got to say I really like the Sumo, I will just need to zero with it on now. With the streamline on medium and Sumo in place this seams more like back yard stealthy.

Thanks FukoChan for the advise, and everyone else as well. I will update with more Chrony data and some longer range groups once I get her completely setup and have the time. I have a feeling she is really going to be a shooter.

EDIT: added my Chrony data to this thread for convenience.

setup: 
-Streamline .25 high power setting w/Donnyfl Sumo installed
-Competition electronics ProChrono w/ front sensor 8″ from end of Sumo
-JSB 25.39gr pellets unsorted 
–All pressures as read by gage on streamlinestarting pressure 230 bar

string1 string2 string3
1-910 11-910 21-908
2-914 12-911 22-913
3-911 13-913 23-914
4-908 14-912 24-915
5-913 15-913 25-914
6-915 16-911 26-911
7-910 17-911 27-916
8-913 18-914 28-915
9-914 19-916 29-917
10-911 20-917 30-913
205 bar 180 bar 160 bar
Average first 3 strings.
Avg 912 
Es 9
SD 2

String 4
31-907
32-910
33-915
34-913
35-914
36-911
37-914
38-915
39-919
40-914
140 bar

Average of all 4 strings.
AVG 912
ES 12
SD 2

"FunGun"Dave, your killing me! When do we get to see what she does on high power? lol.

Click to expand...

well, here she goes. 

I went out after work today to sight in on high power at 50 yards, and shoot some groups. I will say this up front, the gun shoots better than I do at this point. My table was a plastic folding table that was hard to get a steady shot from. If you look closely you can see the folding point just forward of the front sandbag. I will have to see what she can really do when I can get to my local range with the leadsled on a solid bench.


The first group after sight in was slightly over an 1" with one flyer making it 1.5". I really didn't take in account for wind since it was pretty light to nothing at all, but kept shifting direction a little.

First group at 50 yards with Donnyfl Sumo installed 25.39gr Jsb @ 912 FPS. Left and right shift was probably mostly me and a little due to wind.


The second group was with the Donnyfl Sumo removed which is why its a little higher. 25.39gr Jsb @ 916 FPS aim point center of circle. The main group was a little under .875" and my fliers made it 1.875 " 



This last one is a 100yrds with Donnyfl installed. I was using a different subtention holdover for the top 2 shots, the rest were with what strelock said was correct holdover. Group measured 2.75" and excluding those two shots measured 1.875"

I know with a solid bench and some practice I can tighten up the groups. I still have a lot to learn in rifle shooting, as I have mainly been a pistol shooter. It might not be an impressive start, but we all got to start somewhere. 

Edit: I used a hand pump after every 2 mags shots, and did this twice before shooting my groups.

I might go out tomorrow and try a few groups prone with my sandbags and see what results I get.

I went back out this morning it was 68° F with a very light breeze. This time I took my range mat and sandbags to shoot from prone. I loaded all pellets by hand, and only sorted out pellets with more than light dent to skirt, but no sorting by weight. Since I use this rifle for pesting I shot all groups with the Sumo installed.

I ended up doing only 3 shot groups, because the wind kept changing on me and I am not good at judging the wind yet. I think a weatherflow meter is in the near future to help with this. I did notice improvement in group size including the 10 shot groups I started with today. 

Typical 3 shot group from 50 yards. High power setting.



This was my best of the day below.


I end up cutting it short and headed to the driving range to get some groundhogs, but didn't see any as I think it was a little late in the morning, so I packed up and went home. 
I noticed the behemoth groundhog in my back yard when I was unloading my stuff, so I rushed inside to try and setup for a shot.

I will post results here:

http://www.airgunnation.com/topic/new-guns-first-pest/

I have to say that so far I am loving the Streamline, and she is proving to be a good hunter.