Author Topic: Evanix .30 rainstorm modification  (Read 477 times)

oneshot61

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Evanix .30 rainstorm modification
« on: November 12, 2018, 03:56:22 PM »
I received my Evanix rainstorm.30 from pa. Beautiful stock and came shooting pretty hot. With the factory spring flush out with the receiver it was shooting jsb 44.75 @ 991 and jsb 50 @ 957 FPS,  and on a cliff. After clipping the spring 2 coils I flattened out the shot string but realized I had cut a bit to much from the spring. I ordered 2 more in but they did not have the power of the first spring. I then ordered a heavier spring off of amazon and after cutting it to leave a small gap between the valve and hammer, I was rewarded with a nice 92 ft lb 9-10 shot string with 50 jsb and 50 grain Nielsen.30 hp. Unfortunately the springs I received lost their rebound capabilities quickly, and proved to be frustrating getting a consistent string out of them. I sent my rainstorm to rick Morrill and had him open up the valve, Breech and barrel. However, upon opening the gun, he discovered that my “new” gun had the valve modified to .203 with plier marks on the valve. The barrel was still at .195. He opened up the barrel to .202, put in a new unused heavy spring that I had left from the amazon order, and logged a 66 grain bbt @ 900 FPS, which will translate to 925 when sized to .299. I’ve gotten 20-25 FPS consistently when sizing the .300 bullets. I have two flat wire springs waiting to try out, a 17 lb and a 20 lb. Flat wire chrome silicone springs are known for 100’s of thousands of cycles and not losing there strength. I’m using springs from Wilson combat with 1/4 id. I’ll update when my gun comes in the end of the week.
 With the Donny fl sumo and Will Piatt depinger, it’s as quiet as my .25 armada. I shot at 2 hogs in the early morning at 45 yards, unfortunately hitting the branches of a bush I could not see through my scope. However, it was a great test run because they didn’t spook at the low sound level. I now have a varmint light, low level red/green I’ll be using in the future. No more dead bushes :0
« Last Edit: November 12, 2018, 03:58:14 PM by oneshot61 »



Bullfrog

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Re: Evanix .30 rainstorm modification
« Reply #1 on: November 13, 2018, 06:09:25 PM »
The DonnyFLs are nice. I have 2, a Shogun on my .30 Flex Carbine and an Emperor on my long Flex.

How's your trigger? Several years ago I had a bad experience with a Rainstorm bullpup. Loved the inner design of the gun but hated some of the internal parts (soft metal) and also hated the trigger until I reshaped the sear. Is your trigger heavy out of the box?

oneshot61

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Re: Evanix .30 rainstorm modification
« Reply #2 on: November 13, 2018, 07:03:59 PM »
It was very heavy when I received it. It was making it hard for me to get good groups. I lightened it up and it really transformed the gun. It’s easy to lighten too much though and not have the safety work or be able to cock it.
 I must say, I’m a real fan of your videos. Lives in nw Florida for many years, lots of great hunting opportunities there. Nice to have the capability now to take more game with an Airgun.

Bullfrog

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Re: Evanix .30 rainstorm modification
« Reply #3 on: November 14, 2018, 08:12:49 AM »
The heavy triggers, moreso than my previous bad experience with other aspects or the RS, is whats stopping me from experimenting with newer models of Evanix guns. I don’t want to get one out of the box with such a heavy trigger.

oneshot61

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Re: Evanix .30 rainstorm modification
« Reply #4 on: November 24, 2018, 10:36:33 AM »
17 and 20 lb flat wire springs didn’t work out. Way to soft. The flat wire is a whole new world. I ordered and now have a 24 lb in hand and will try it today  or tomorrow. I had very little daylight left yesterday but I can tell it’s making more power lower in the pressure band and at 3k I’ve gained about 40 FPS. Pushing a 50 jsb near 990. All with a spring that’s to short. I compressed a spring last night, then cut 1.5 coils off and at flush I have 1/16 gap between valve stem and hammer. Spring is .063 wire, .480 in diameter. Hopefully I’ll have some shot strings by tomorrow.

oneshot61

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Re: Evanix .30 rainstorm modification
« Reply #5 on: November 26, 2018, 05:50:25 PM »
So I have a few numbers although not definitive, still very promising and more to come.
Ports at .203 3k psi . Spring was preset.
.063 music wire spring cut to1/8 gap between the hammer and valve stem. Adjuster flush to the tube . 3000 psi, 50 grain jsb. 933,932,936,938,936,930,927.
1/4 turn in and nearly identical shot string with 52 grain eppug from Rick Morrill sized to .299. (the 52 are accurate. I’ve shot some 50’s that were not)  This puts it at just over 102 ft lbs for 7 shots.
60 grain 854 -7 shot bell, same spring set
66 grain 825 - 7 shot bell, same spring set
 Next test will be at 3200 psi with 50 jsb, 52 eppug, (pic below) 60 grain and 66 grain bbt hp. I will have a new spring,(pic below) ss,.072 wire cut to leave a gap for free flight. The goal is not max ftlbs or FPS, but max for 7 shots for hunting. Then detune with a spring for 85 ft lb with pellets. Haven’t tested yet for max cliff power.
New springs  will be in Wednesday noon

oneshot61

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Re: Evanix .30 rainstorm modification
« Reply #6 on: December 12, 2018, 07:45:31 PM »
Work is taking all my daylight hours lately, but I got about 30 minutes to run some testing with my new ss spring. My thoughts are that unless I’m shooting for one mag at high power with the 66 grain bbt it’s a bit to strong for a decent non peaky string. Even with nearly 1/4 inch free flight my spread is 27 with one shot in the middle causing all the problems. 908-937-899 FPS over 12 shots, jsb 50.  It’s just pushing the hammer to fast. However.. I tried something quickly today and preliminary testing is promising. I inset a strong magnet into my stock, centered and near the back half of the hammer at rest. I think because of free flight it has a chance to slow the secondary hit to the hammer. I was able to get three more shots over a 900 FPS threshold. All testing was at 3050.  Next testing will be with my 18 lb spring with the magnet installed. I’m looking for 14 shots over 920... hopefully..then take this to 3200 psi and test for a high power 7 shot mag.

steveoh

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Re: Evanix .30 rainstorm modification
« Reply #7 on: December 13, 2018, 09:42:43 AM »
Interesting thread. I've had a hankering for an Evanix for several years now.  So lets see, a .30 Rainstorm, or a .257 Airforce Texan next? Different critters for sure.  At any rate if I were to "spring" for a Rainstorm then your information on springs is very valuable indeed.

thanks for sharing!
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Bullfrog

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Re: Evanix .30 rainstorm modification
« Reply #8 on: December 13, 2018, 10:15:08 PM »
 
Interesting thread. I've had a hankering for an Evanix for several years now.  So lets see, a .30 Rainstorm, or a .257 Airforce Texan next? Different critters for sure.  At any rate if I were to "spring" for a Rainstorm then your information on springs is very valuable indeed.

thanks for sharing!

I'm telling ya, people need to be trying the .308 Texan SS as a .300 pellet shooter. A hellaciously strong pellet shooter that can adjust down to normal .300 pellet power levels.

Evanix has been teasing a model called the Cloud now for about a year or more. Its the first Evanix since my bad Rainstorm experience that I'd be excited to try. Its a bit like the Hammer right now, it hasn't materialized yet. But if it does I may try one in .357 if I haven't got a .357 Texan SS first.

oneshot61

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Re: Evanix .30 rainstorm modification
« Reply #9 on: December 14, 2018, 05:11:00 AM »
I saw your video and post on that gun. That and a .257 is really catching my eye. The 308 is a real hammer and it looks like there are a few bullets that shoot well out of it too. It’s hard to beat the air force platform for power. I haven’t seen the Evanix cloud, I need to look that up.

oneshot61

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Re: Evanix .30 rainstorm modification
« Reply #10 on: December 23, 2018, 08:50:11 PM »
I filled the rainstorm to 3200, still have the ss spring in with only one magnet. No time to dremel out for the other one today. I should have went to the 3240 listed on Evanix site.(actually it’s 3335) At the end, I lost one shot. 50 jsb sized to .300.
918,920,924,924,925,932,925,920,924,926,922,920,916. 13 shots, 3200 psi to 2460. 740 psi, 56 psi per shot avg. 94.55 ft lb average. This setup loves the 3200 fill. One more tuning thing to try, then I’ll turn the probe and radius the valve.
 Looks like efficiency at 1.58.