Author Topic: Anyone else finding the .30 Polymags finicky?  (Read 1649 times)

Bullfrog

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Anyone else finding the .30 Polymags finicky?
« on: November 01, 2016, 08:04:32 PM »
When I first got my Flex I ordered 2 tins of .30 Polymags. I've been very sparing in shooting them. I'm only just now close to finishing up the second tin. Preliminary results at the default 80fpe indicated that they shot well at 25 yards. However, when I started stretching them out much further than that I started seeing flight consistent with tumbling. I had pretty much written them off.

However, last week I started experimenting with slowing them down and I found that they grouped ok out to 50 yards when launched around 860fps or below, with them shooting really well below 850fps. Once in a while they would throw a flier but more often than not the shots were tight. Then this weekend I turned the power up to 88fpe and found that they shot even better out to 40 yards. Not quite what I'd like them to be beyond 50 yards, but within that range they would be just fine for any hunting application I can think of. Therefore I'm coming around to believing they perform acceptably out of my gun at slower or faster than average speed, but there's an "unsweet" spot in between that they don't like.

Anyone else finding them really finicky?



rsterne

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Re: Anyone else finding the .30 Polymags finicky?
« Reply #1 on: November 01, 2016, 08:50:35 PM »
My guess is that "unsweet spot" is more likely barrel harmonics than anything to do with the pellet per se....

Bob
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Dairyboy

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Re: Anyone else finding the .30 Polymags finicky?
« Reply #2 on: November 02, 2016, 05:58:14 AM »
On my .30 Mrod I found them to be very very accurate around 820fps. They were just as accurate at that speed as the JSBs at 50yds. But like you said turn up the speed to 80fpe and no good
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Slayer

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Re: Anyone else finding the .30 Polymags finicky?
« Reply #3 on: November 02, 2016, 12:51:25 PM »
Shooting them at 885 in the EVOL with excellent results.  What surprised me was they had the same point of aim at 85 yards as the JSB 44 gn.  I would have guessed their BC would be atrocious comparatively speaking.

Tom

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Re: Anyone else finding the .30 Polymags finicky?
« Reply #4 on: November 02, 2016, 01:02:49 PM »
Havent shot them out of any gun yet that would group well past 850fps so I tune them down to 800ish.

Bullfrog

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Re: Anyone else finding the .30 Polymags finicky?
« Reply #5 on: November 02, 2016, 03:34:25 PM »
Havent shot them out of any gun yet that would group well past 850fps so I tune them down to 800ish.

Have you tried launching them really fast, around or over the 950fps range? It does appear that they perform decently at that speed out of the Flex. Not as great as the regular JSBs but good enough for precise shooting within 50 yards and minute of small varmint beyond 50.

I've been shooting soda cans and milk jugs both filled with water to test the Polymag's damage. I've shot so many water filled cans with my .25 Marauder at different speeds and with different pellets that the damage done to the cans actually tells me something comparatively. Within 30 yards the soda cans shot with the .30 Flex near 90fpe looks like they were shot with a high velocity .22LR HP. Split down the middle and ripped in half at the midsection. Out at 60 yards I don't see a big different between the Polymag and the regular JSBs. Split down the middle to a lessor degree with a walnut-sized exit hole. If the Polymags don't give me a killing advantage at long range, I don't see a reason to shoot them past 50 yards anyhow.

Travis, remember that fox I knocked out with a ricocheting pellet and then shot and killed with a double lung shot a couple of week later? The pellet that ricocheted was a Polymag going about 890-900fps. I now suspect it was tumbling when it hit the fox, thus the reason it bounced off his shoulder instead of penetrating it. I've shot cans at that distance and speed and they appear to take the pellet at an odd angle and it just tumbles thru instead of hitting square on and expanding in the water.

I've talked to a Hatsan owner that is reporting similar results as us. Tom, I'm glad they're shooting awesomely out of the EVOL. But I do wish JSB might figure out a way to refine them a bit to make them perform very well in most guns at most speeds. My .25 Polymags are some of the best shooting pellets out of my Marauder.

Slayer

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Re: Anyone else finding the .30 Polymags finicky?
« Reply #6 on: November 02, 2016, 08:31:59 PM »
My experience is only with the 30s.  In my rainstorm they shot excellent to 50 and acceptable at 85 yards.  Not as good as the 44s though.  Noting shoots like the 44s; they are simply amazing. 

Tom

Bigredhunter00

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Re: Anyone else finding the .30 Polymags finicky?
« Reply #7 on: January 21, 2017, 07:24:12 AM »
Bullfrog,

Get with monkeydad.  He has direct line with the owners of predator.
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Alan

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Re: Anyone else finding the .30 Polymags finicky?
« Reply #8 on: January 21, 2017, 09:53:11 AM »
I can't get PolyMags to shoot well either, and I've tried them is three different guns and two different calibers. The RedFires (.177) seem to do okay out of my 397, but then it is a 25 yard gun at best.
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