Conditions: +16°C, 2-5m/s wind, fog Gear: AF .223 + TT-OPTH, NOE SP-GC 51gr .223″
Finally got my new valve stem/onepiece tophat from TalonTunes to replace the broken stock one. Regardless from the pressure and/or HST, without any restrictor insert, the infamous valve dump occurred. TT tophat seems to have more gap between the tophat and valve housing compared to my setting with the stock stem, so I’ll propably try to put o-ring between tophat and housing to decrease stem travel and therefore avoid valve dumps.
After inserting the largest restrictor the gun worked fine, but velocity was rather low (I think it was sub 250m/s, didn’t chrony). Few 10-shot groups with this setup:
While I’m waiting new valve stem for my AirForce, went out to range to shoot some groups with Leshiy. I used 31gr H&N Grizzlys calibrated to .2495″. Although it was very, very windy outside, the range area was relatively calm.
After few sighter groups I decided to remove the rail extender, because it seemed to amplify the hold sensitivity and caused some extra vibrations to the frame.
Leshiy ain’t the most accurate gun with this ammo, but considering it’s price (3cnt per bullet) it’s very, very good. Also if you add that as Leshiy being very lightweight (less than 2kg without accessories) and therefore pretty difficult to shoot. Also the barrel is only 350mm (or 250mm in stock form) in length, so it’s pretty efficient when producing 55 Joules (40ft-lb) of muzzle-energy.
I also had possibility to test out Evanix Sniper X2 in .50cal. It ain’t the most accurate PCP out there, but it’s fun to shoot for sure!
For comparison, here’s a picture of .25cal 31gr H&N Grizzly and 185gr hollowpoint recovered after hitting steel plate from distance of 100 meters.
After degassing the tank, I started to remove the tophat and noticed that the whole valve stem came out.. or part of it.
Not sure if the stem was a “lemon” from the factory as I was only shooting with HST set to minimum and shot count was way below 2000 when this happened. I can imagine how much beating the stem takes when the HST is set to maximum.
Tested various different shooting techniques from bench today and made some improvement (or so do I think).
Tightest groups were forming, when applying moderate amount of pressure against the bipod and the cheek rest. I also worked with the trigger hand and played with the trigger shoe position while doing dry fire practices. The groups were not that great (around 1.6MOA), but there seemed to be much less dispersion than before.
It looks like to me, that there’s one tighter group on each paper. With NOE the group size was 46mm for 10 shots and first 5 shots in the upper left corner are 18mm (0.6MOA). With RWS .22lr bullets there seems to be (maybe) two fliers in the lower right and without them, there’s a group of 8 shots which measure 31mm c-t-c (1.07MOA). With the fliers included, 10-shot group is 50mm.
Also did 5-shot group to 140 meters using NOE 51gr spitzers.
At the end I set up some steel plates to shoot from 120 meters, but after few shots, something happened with the valve as the gun does not fire anymore. Need to disassemble to valve tomorrow.
Conditions: +14°C, little to no wind, fog Gear: AF .223, NOE SP-GC 51gr & RWS 41.5gr
Decided to print GTA forum’s ‘Nuthin’ Under A Hundred -yards‘ target and try to shoot it. It’s actually very good target to measure precision of the gear and accuracy of the shooter at the same time. After zeroing to 100 yards, here’s the result:
Not the best 5-shot group, but I’ll take it. Two shots went actually almost from the same hole. Luckily I took it on video. Need to try this again!
Back to basics: for a better cheek weld from prone position, I cut a piece of 75mm PVC pipe in half and taped it on the tank. Still slightly too low, but much better now.
2×10 shots from prone:
It was getting very foggy. Center of the target was only hazy gray spot through the scope.
That’s enough for excuses. One last group with RWS 41.5gr .22lr bullets.
Conditions: +24°C, 2-4m/s wind with 6-8m/s gusts, rain showers Gear: AF .223, NOE SP-GC 51gr .223″
Lots of shooting today. Sent around 80 bullets and over 250 grams of lead into the sandpit during the night.
First some prone shooting. 3×10 shots. Didn’t went very well and I definitely need proper adjustable cheek weld to be able to lay down with the rifle without any stress in the neck area. I didn’t noticed any horizontal POI shift as before when shooting from prone position. I think that last time I didn’t pay enough attention to barrel-spine line and was off to the left from the gun.
Shot also few groups from bench and tested the barrel dampener in few different positions. Not much difference and I definitely need to get more consistent results without it and then start fine tuning the barrel harmonics, if needed.
I was running out of light, but decided to test one more group from prone position with using smaller bag as a cheek rest.
The group was slightly better and was shot with a very fast pace.
It was very windy during the afternoon, so decided to see how 51gr spitzer and 41,5gr RWS perform in windy conditions. I tried to avoid worst gusts, where even big trees were bending noticeably, but sometimes they just started to blow while I pulled the trigger.
Almost hit 10-shot/1MOA/100meters group today with my .223 using NOE Spitzers. I’ve had several sub-MOA 5-shot groups at 100m and plenty of 3-shot groups where holes touched each other, but for real measurement of precision , 10-shot string is something where luck has no place.
I also did 10-shot group with RWS 41,5gr .22lr bullets (.223) from 100 meters. The group started great, but got worse after 5 shots. Maybe it’s the bullet, maybe the shooter, or both.
As a conclusion, I believe this gear can deliver 1MOA precision.