Gun #2. – An effort at shooting FT below German rules
But still, there are enough Germans shooting FT in Lessons 4 and 5 that there are actually fits held for those.
Class 4 is the “F in Pentagon” (under seven. 5 Joules/5. 5 Ft-lbs) spring-piston rifles that recoil
Class five is the “F in Pentagon” (under 7. 5 Joules/5. 5 Ft-lbs) spring-piston weapons with recoil-less actions
These two classes are chance at distances between nine and 25 meters (as opposed to 9 to fifty meters that the 12 ft-lbs limit game is played).
If you have ever tried to shoot the Match airgun at twenty-seven yards (25 meters), you are going to realize that it is not an easy task. particularly in the outdoors.
Here in the US, all of us do not have those limitations, therefore, when someone talks about “indoor FT” (where distances virtually correspond to Class four and 5 airguns within German FT), eyebrows are usually raised, and some even begin gathering green firewood in order to burn the heretics, ROFL!
But , we’re moving too quickly ahead, let’s talk about THE PARTICULAR RIFLE.
As we said within the first part of this access , we had procured 2 LGV’s directly from Germany:
The first, we discussed extensively in this entry, and so we will not really go into it again right here.
Gun Number 2 got lost all historical or even collector value because a range rail had been added.
Here is a picture from the modification made by a German born gunsmith, attaching the range rail where normally the particular “Walther” brand and Obvious statement would have been noticeable:
In any case, as I said above, this particular rail destroyed any collector’s value the gun might have had and so, it designed for a good test-bench to try some different things and see where the limitations of the little engines are lying as far as power with precision is concerned. And, do make sure you, remember at all times that strength by itself is useless within airguns without accuracy.
The same gooey mass left the compression chamber associated with gun #2, and we used same method (acetone) in order to dissolve the slime, plus a contoured brass rod in order to scrape, without scratching, the particular compression chamber walls.
The same HMO design piston went into this weapon with an Urethane ORing since the temperatures and the pressures expected do not warrant the usage of HNBR material.
I will not get into all the details of the different things attempted (we tried Titan suspension springs #’s 7, 10, plus 1; plus the OEM springtime and the two counter-wound OE half-springs), but the end result had been very interesting:
Using a Ti (symbol) # 1 spring, reduce to 21 total coils (yes, it was a drastic reduce off), we obtained an extremely nice shot cycle, fairly skewed towards the light pellets normal for these guns:
The particular Diabolo Basic yielded 678 ± 4 fps
The QYS. – 566 ± 5 frames per second
The JSB RS’s. – 575± five fps
And, just out of curiosity, We tested the Domed GTO’s (made out of tin utilizing the JSB Exact 10. thirty four die) and what a surprise. – 732 ± 4 fps
the “little engine” was doing 8. one ft-lbs at the muzzle!
We have heard of FWB 300’s that will using the JM/ARH “Arctic” springtime yielded 7½ to 6 ft-lbs, but I have in no way actually seen, tested, neither shot one. So , in my experience, that is still “vaporware”. Yet this is reality.
Checking the precision, at first was somewhat frustrating. The D-B shot nicely, but as a wad-cutter, it had been not precisely FT materials.
The RS’s performed very poorly, yet that detracts nothing from the JSB quality, it ways that the bore is a little around the large side.
The GTO’s were absolutely nothing to brag about, therefore i started thinking:
Here was obviously a gun that was NEVER meant to reach the 8 ft-lbs, the barrel was pencil-thin, and the weight enhancing “anchor” of a sleeve was not presently there. Originally, it had paid for a medium weight outter, but we did not require weight, we needed solidity.
And then this flashed into my brain some experiments performed long ago when (1975-1976), with an ultralight-mountain rifle in a heavy quality.
And so, I actually decided to put a tensioning sleeve on the little LGV.
I procured some CF tubes in different sizes plus tried various combinations associated with wall thickness to stress.
I also tried the particular Baracuda Green pellets.
Finally, the best result was acquired with a 15X18 CF pipe tensioned to 35 in-lbs:
But , what to do with this weapon? apart from shooting Olympic Go with, of course , ROFL!
Well, the good friends at Palmyra Sportsman’s Association supplied the answer:
They will hosted an indoor/winter FEET session (ofcourse not really a Match), that acquired targets between the 10 back yards and the 22 yards that will their indoor range permitted.
Obviously, the idea was to place some “handicap” into the capture by not shooting the “formal” competition airgun. Is actually no fun to clean a course which has been designed for less energy plus less ranging capabilities.
Therefore , this little gun arrived perfectly for the task. Just how perfectly? you will have to be patient mainly because first we need to talk a little more about the gun.
The challenge in order to shoot indoors and still set a meaningful event, starts using the optics.
You simply cannot place a monster scope on top of a relatively little engine. Indeed, you will range perfectly, yet that is not a challenge! I began looking over my collection of scopes and although I have several really remarkable specimens, right after some testing between eyesight relief, magnification, weight plus mounting options, the only real alternative was a Leapers Bug-Buster, placed in a pair of old steel RWS adjustable mounts.
Why the need for adjustable brackets?
Consider the OEM peep sight provides about 50 MOA’s associated with elevation capacity. There is NO range in this size that can suit that.
As well as the rifle’s architecture does match that. So: adjustable brackets!
Here is the result:
Here is a view of the OE peep arrangement:
And, so equipped, I shot a few distance targets to try to create the trajectory:
Overall the particular gun is a pleasure to check out, to shoot, and to have.
And they didn’t use unattractive wood either:
One thing that will did became apparent in early stages is that the gun is heat range dependent. I am not stating sensitive, because 50° Farreneheit of temperature swing is certainly nothing to sneeze from. The gun had remained in the trunk of the vehicle overnight, and then brought in to the indoors range where i was shooting in long sleeved T Shirts.
After a little while along with a little bit of action, the weapon stabilized and I started capturing the course.
Keep well plus shoot straight!
HM © 08/02/22