.22 HW97K w/Vortek PG3 Steel HO kit, 100yds

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Sqwirlfugger57 thanks definitely going to change my springers over this winter. Should get good at putting them in by the time I do the last one. I’m really happy with the Springers now, can’t wait. Crow
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Your welcome man. You'll definitely love the difference. I don't use a spring compressor BUT I would highly recommend one for this job if you don't already have one. They're pretty cheap to build.
 
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Pretty nice shooting!

I happened to be playing around with Chairgun when reading your post. Assuming the H&N FTT 14.66 grain pellet has a ballistic coefficient (BC) of 0.019, and given 690 fps, 100 yards, and assuming about 2" scope height zeroed at 30 yards, the POI drop is about 41" at the target.

Does that sound about right? 

I got the 0.019 BC from Hard Air: https://hardairmagazine.com/ballistic-coefficients/  Other sources can differ wildly. For example, here's one that credits the H&N FTT with a 0.290 BC, which makes a huge difference, it raises the POI to 36". (see https://www.airrifle.co.za/library/Air_Rifle_Pellet_Ballistic_Coefficient_Database.pdf)

I recently bought a range finder and might take my HW95 out for a 100 yard spin. It's about the same power level. I also have some H&N 21 grain pellets I'd like to try. They have a BC of 0.07. In Chairgun they have almost the same 100 yard POI as the H&N 14.66, despite weighing 6 grains more. They start out slower (about 580 fps) but don't shed velocity as fast. At 100 yards they retain more than twice the kinetic energy, 11 foot pounds vs 4 for the H&N 14.66. 

I wish they made a 14 grain .22 slug. Maybe alloy rather than lead.

Of course, that's Chairgun. Reality may differ, especially if the BC values are not correct.

I am certainly no expert in any of this. Just having fun.
 
Upvote 0
Pretty nice shooting!

I happened to be playing around with Chairgun when reading your post. Assuming the H&N FTT 14.66 grain pellet has a ballistic coefficient (BC) of 0.019, and given 690 fps, 100 yards, and assuming about 2" scope height zeroed at 30 yards, the POI drop is about 41" at the target.

Does that sound about right? 

I got the 0.019 BC from Hard Air: https://hardairmagazine.com/ballistic-coefficients/  Other sources can differ wildly. For example, here's one that credits the H&N FTT with a 0.290 BC, which makes a huge difference, it raises the POI to 36". (see https://www.airrifle.co.za/library/Air_Rifle_Pellet_Ballistic_Coefficient_Database.pdf)

I recently bought a range finder and might take my HW95 out for a 100 yard spin. It's about the same power level. I also have some H&N 21 grain pellets I'd like to try. They have a BC of 0.07. In Chairgun they have almost the same 100 yard POI as the H&N 14.66, despite weighing 6 grains more. They start out slower (about 580 fps) but don't shed velocity as fast. At 100 yards they retain more than twice the kinetic energy, 11 foot pounds vs 4 for the H&N 14.66. 

I wish they made a 14 grain .22 slug. Maybe alloy rather than lead.

Of course, that's Chairgun. Reality may differ, especially if the BC values are not correct.

I am certainly no expert in any of this. Just having fun.
Click to expand...

I'm not positive about the actual drop (Strelok claims 56"). I have Strelok setup with a 1.9" scope hight .021 BC and was zeroed at 55yds previously. From there I adjusted my scope up an additional 6 or so MIL (Strelok says 8 but that wasn't right). I generally only use a ballistic calculator to get a rough idea of what I'm working with when I try a new setup. From there I go to a notebook with hand written actual dope.
 
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