A long time AGN member asked me to tune his .20 HW80 for him, shipped it a week ago, and it has disappeared into "never never land." It should have been here last Tuesday but still hasn't shown up and USPS hasn't updated its status to the tracking site for a couple of days now. I hope for his sake it shows up.
At any rate, I had everything set aside and ready to perform the .20 caliber tune for him, and had blocked out time this weekend to do so. With nothing else really to do that was in any way productive, and too cold outside for much else, I decided to test all of the available .20 pellets I had in my always remarkable Weihrauch HW97KT. A few years ago, I installed a Vortek PG-4 Steel HO kit, including the Vortek vacuum piston seal, with the spring cut down to produce between 14.5 and 15.5 fpe.
I have written about this rifle before. It is incredibly consistent as you will ascertain from the accompanying SD data. The original tune resulted in the JSB 13.73 pellet being selected as the preferred ammo, but after many thousands of shots, I thought it would be interesting to see if this were still true. In the end, the 13.73 and the 15.89 pellets basically produced the same group results, though the 13.73 velocity is higher (as anticipated), allowing the rifle to shoot a little flatter. This rifle has been remarkable shooting consistent 1/2" to 3/4" 10 shot groups at 50 yards.
The results of my testing, at 18 yards indoors, can be found below. Thanks for looking...DZ
At any rate, I had everything set aside and ready to perform the .20 caliber tune for him, and had blocked out time this weekend to do so. With nothing else really to do that was in any way productive, and too cold outside for much else, I decided to test all of the available .20 pellets I had in my always remarkable Weihrauch HW97KT. A few years ago, I installed a Vortek PG-4 Steel HO kit, including the Vortek vacuum piston seal, with the spring cut down to produce between 14.5 and 15.5 fpe.
I have written about this rifle before. It is incredibly consistent as you will ascertain from the accompanying SD data. The original tune resulted in the JSB 13.73 pellet being selected as the preferred ammo, but after many thousands of shots, I thought it would be interesting to see if this were still true. In the end, the 13.73 and the 15.89 pellets basically produced the same group results, though the 13.73 velocity is higher (as anticipated), allowing the rifle to shoot a little flatter. This rifle has been remarkable shooting consistent 1/2" to 3/4" 10 shot groups at 50 yards.
The results of my testing, at 18 yards indoors, can be found below. Thanks for looking...DZ
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