Reply To: Gamo Whisper Cat Ballistics

Forums Springers, Pumpers, C02, & Vintage Gamo Whisper Cat Ballistics Reply To: Gamo Whisper Cat Ballistics

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jonny75904
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Just chrono’d two new pellets, both .177cal.  

15gr H&N Sport Sniper Magnum, 525fps avg
11.37gr Beeman Silver Arrow, pointed.  617fps avg

Both chrono’d for 10fpe, and I’m concluding my whisper cat consistently produces a 10fpe (ish) projectile.  Perhaps the cylinder runs out of oomph before the pellet completely leaves the barrel, or perhaps that’s all the energy the spring can produce.  

Oddly enough, the 15gr fly to the right and higher than my crosman 10.5gr round domes – my go-to pellet for all things accurate.