GTA
Airguns by Make and Model => Evanix Airguns => Topic started by: USMCSgt85 on May 03, 2018, 08:05:29 PM
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Step 1: I purchased my Rainstorm 2 years ago from PA. This is not my first airgun but it was my first pcp. While I did like the initial power I didn't like that constant downward spiral of power and changing POI.
Step 2: I decided to put in a Huma regulator and spent a couple of months, shooting over a chonograph, adjusting the pressure with my goal to get 20 "perfect" shots with racoons and possums being my largest game. I settled on 137 bar and I got about 12 "perfect" shots at about 855fps with a 25.39gr JSB Exact King.
Step 3: Then I read about the easy way to have a zero preload on the hammer, on this forum and so set out with some prudent advice from Manny. I now get 22 to 23 shots at 851fps and 1/2" groups at 50 yards. The hammer has about .250" free travel after the stiff shortened spring stops pushing and between the higher shot count and my trigger now down to 11oz...I'm getting to like the rifle even more.
Favorites for my rifle are: JSB 25.4 Exact Kings, H&N Extreme Hunters, Air Arms Diablo Field 25.4grs and in fourth place JSB 33.9gr Heavies. These will all group under 3/4" at 50 yards with some going into 1/2" or less for 5 shots.
In 10 to 15 mph cross winds yesterday, at 106 yds I got off 4 shots, no more than 1/2" away from hitting the rodent before he took off. I had a hard time shooting because of me laughing at the way it was jumping around wondering what was going on...oh and I have a Wolf can on my rifle.
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That's great, ......yes negative pre-load does wanders :)
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Would this mod work for an Evanix Sniper in .45 cal too? What do you do to the spring to get the desired results? I've been looking for a Rainstorm in .30 cal too and would like to do the mod to it when I find one. I hope that you don't mind me butting in to your thread.
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Would this mod work for an Evanix Sniper in .45 cal too? What do you do to the spring to get the desired results? I've been looking for a Rainstorm in .30 cal too and would like to do the mod to it when I find one. I hope that you don't mind me butting in to your thread.
Evanix .45 tuning thread: https://www.gatewaytoairguns.org/GTA/index.php?topic=110075.msg1050388#msg1050388 (https://www.gatewaytoairguns.org/GTA/index.php?topic=110075.msg1050388#msg1050388)
For a bigbore Evanix a double spring combo is the way to go. Use negative preload for best air efficiency.
(https://farm5.staticflickr.com/4260/35732912186_efaab82c36_b.jpg) (https://flic.kr/p/WrAvSS)IMG_2323_zpslmqyfzwz (https://flic.kr/p/WrAvSS) by abbababbaccc (https://www.flickr.com/photos/11843711@N08/), on Flickr
(https://farm5.staticflickr.com/4115/35774072825_6cabe3a44f_b.jpg) (https://flic.kr/p/Wvetv4)IMG_2324_zpsswiaecsi (https://flic.kr/p/Wvetv4) by abbababbaccc (https://www.flickr.com/photos/11843711@N08/), on Flickr