Am I to assume that these BC values don't apply when these pellets are shot from my Gamo Swarm with 100-150 less fps velocity ?
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There is a partial answer in this post by Yrrah comparing BSA barrel with ST:"SMH77"Thanks for the link and to HAM for testing / providing this data.
I do have a question though: the testing was performed with an FX Impact-I'm assuming that is the 'FX smooth-twist' barrel that was on the gun (it wasn't listed)? If so, how do I 'convert' these BC's to the LW, LW-Polygon barrels I'm using on my gun? I'm sure nobody has the exact data, but my particular interest lies the .25 cal JSB Exact 25.4 grn and Exact heavy (and MkII) 33.95 grain pellets (through a Polygon barrel @ 900 fps from a RAW HM1000x) and a .30 cal JSB Exacts (44.75 grain & 50.15 grain) from the same gun. I'm also curious if there is data from the H&N Barracuda (31.02 grain, in .25 cal) pellets.
If anyone knows where I can obtain some of this data for these pellets from these barrels (and even from a RAW HM1000x would be an 'bonus, bonus'), I would appreciate it greatly.