JSB Exact Jumbo Heavy 18.13gr Groups, BC - BT65 .22 without and with regulator valve comparison
Рет қаралды 13,375
8 жыл бұрынIn this video: groups with JSB Exact Jumbo Heavy 18.13 grains 5,52mm pellets and Hatsan BT65 SB Elite .22. Groups were made first with BT65 original, and later after installing a regulator valve. Muzzle velocities from all shots were measured and showed along muzzle energy. Groups were analyzed with OnTarget Precision Calculator software. Results in Metric and Imperial systems.
Ballistic Coefficient was calculated with Hawke ChairGun software, using the feature to calculate BC from velocity difference. To obtain the initial and final velocities two crhonographs were setup, one at muzzle and other at target 28,97m distant. 30 shots were measured this way, with regulator valve keeping Hatsan BT65's muzzle velocity at 277m/s.
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Questions, suggestions, corrections are always welcome.
@garybillington2239 8 жыл бұрын
What an excellent review of the absolute basic thing in airgun shooting, the humble pellet and the effect of too much power in a decent budget pcp rifle. Transformed with a regulator. Well done on a very well put together, very proffessional, video thank you.
@unrelatedactivities 8 жыл бұрын
Thank you Gary!! You are right, before the regulator only heavy (and expensive) pellets gave good results. You are welcome!
@whistlingcanine1098 8 жыл бұрын
Cool H.U.D. on your shooting/chrony info.. Never seen that before.. It would be awesome if that was displayed in your scope..
@unrelatedactivities 8 жыл бұрын
That would be really awesome, plus range finder and wind indicator: high tech scope with all info displayed. Thank you for watching!!
@lunetaleapersleapers245 8 жыл бұрын
Como sempre excelente!
@unrelatedactivities 8 жыл бұрын
Valeu JP!! Abraços!!
@KlabecPlinking 8 жыл бұрын
Parabéns amigo!!!!!...gosteeeeei!!!!
@unrelatedactivities 8 жыл бұрын
Obrigado!!
@ssevikeroutdoors7706 7 жыл бұрын
I ve been using ( strelok +) wrong BC then. It's 0.033 at 270mps. Great job man! Thanks
@unrelatedactivities 7 жыл бұрын
Thank you.
@smrefrigeracaosabba828 8 жыл бұрын
muito legal, esse experimento. eu instalei um regulador na minha galatian,ficou show .um abraço
@unrelatedactivities 8 жыл бұрын
Obrigado!! É uma arma lindona a Galatian, o cilindro dela é o mesmo que o da BT65, ou tem alguma diferença? Abraço!!
@LuizGonzalez 8 жыл бұрын
show.. belo video.. bem técnico.
@unrelatedactivities 8 жыл бұрын
Luiz
@paulomarcoa 8 жыл бұрын
Ficou muito boa com esse regulador, se baixar um pouco mais a velocidade ainda vai conseguir uns grupos um pouco melhores! Cumprimentos amigo.
@unrelatedactivities 8 жыл бұрын
Oi Paulo! Estou aguardando o regulador trabalhar mais um pouco para ver se não haverá mudança na velocidade, depois vou fazer exatamente o que você me aconselha, ajustando a força do martelo. Forte abraço!
@badboyrick3520 5 жыл бұрын
Hey guys I determine with a FX Impact a BC of 0.0415 for the JSB Exact Jumbo Heavy 18.13gr ... M V of 272 m / s usually you read the BC for the JSB Exact Jumbo Heavy 18.13gr between BC 0.033 - 0.035 that is in my opinion much too low. With the BC of 0.0415, in the Strelok PRO, the FX Impact work together perfectly..
@MrStevedore1 7 жыл бұрын
I think a .22 pellet traveling at more than 1000 fps is not as stable than that is traveling of less than 1000 fps. With a very prominent air rifle like Hatsan and with the right pellet weight/velocity combination, the groupings could be much better specially on the non-regulated. With the installation of the regulator, velocity has been reduced hence better accuracy. Just my five centavo thought.
@unrelatedactivities 7 жыл бұрын
I agree, without regulator, heavier pellets like JSB Ultra Shock Heavy usually grouped well at the sweet spot. One advantage on the regulator side is having a greater number of good shots. Thank you for your comment Stephen!!
@MrStevedore1 7 жыл бұрын
My pleasure, sir. And thanks for your posts.
@alexanderdragnev5966 7 жыл бұрын
Excellent video and measurements :) Have you measured the BC of the Exact Jumbo Monster .22 1.645 g? It can be found nowhere on the internet...
@unrelatedactivities 7 жыл бұрын
Thanks! No, but I have measured the BC of JSB Ultra Shock Heavy .22, wich has same weight and may have a similar BC: kzfaq.info/get/bejne/Zsp4Y6SD37aul2g.html
@alexanderdragnev5966 7 жыл бұрын
Thanks so much for the useful information :) I've been looking for the BC of the Ultra Shocks .22, as well. Made some calculations based on velocities measured by another airgunner and the result was the same: ~0.022. Your video reconfirms the calculations and makes me sure of them :) I'm subscribing to your channel :)
@unrelatedactivities 7 жыл бұрын
I bought the JSB Exact Jumbo Monster and its BC will be measured this month.
@alexanderdragnev5966 7 жыл бұрын
Thanks big time, mate :)
@tiao303 8 жыл бұрын
muito bom, vc usou so a válvula reguladora?como faço para adquirir?
@unrelatedactivities 8 жыл бұрын
Obrigado Odecir!! Além da válvula tem o supressor, (Air Rifle, ótimo supressor) mas este influencia bem pouco na velocidade. A válvula eu comprei na Dispropil: dispropil.com.br/produtos/valvula-reguladora-de-pressao-bt65 Abraço!
@smrefrigeracaosabba828 8 жыл бұрын
o cilindro é o mesmo. posta mais videos pra nos.até mais
@unrelatedactivities 8 жыл бұрын
Obrigado! Logo faço mais alguns, abraço!!
@manoelmeira4903 5 жыл бұрын
Que marca e esse regulador?
@unrelatedactivities 5 жыл бұрын
Zeca.
@fredcanaldr 8 жыл бұрын
Ai sim!!
@unrelatedactivities 8 жыл бұрын
Obrigado!!
@whiff1962 8 жыл бұрын
You could also have shot heavier pellets and maybe gotten better groups.
@unrelatedactivities 8 жыл бұрын
Yes, before installing the regulator the pellets she liked more were H&N Baracuda and JSB Exact Jumbo Monster.
@joannamakutra3641 7 жыл бұрын
if you use lotar walter barrel. u will do better groups
@unrelatedactivities 6 жыл бұрын
Thanks Joanna! I would love to try it, unfortunately they are not available here and very difficult to import due to Brazilian gun regulation laws :-(
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