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PostPosted: Sat Aug 13, 2016 5:31 am 
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Joined: Fri Jan 06, 2012 7:16 am
Posts: 122
Location: River John Nova Scotia
Does any one know the length of the .177 polymag and metalmag . Will they work in the magazine of the smith-wesson 686 or are they too long..
The .22 metalmag is too long for my BNM breach, will try to take a bit off the end to see if they will work.
Would like them for hunting, have great penetration power.

Wayne


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PostPosted: Sat Aug 13, 2016 6:22 am 
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Joined: Thu May 07, 2015 8:30 pm
Posts: 1190
Location: Eastern Townships
A .177 Predator MetalMag is 0.350'' in length, a bit less than 9 mm. By comparison, a Crosman Premier Hollow Point pellet is around 0.214'' (around 5.5 mm). I believe the Polymag is about the same length, but it'll have to be confirmed by someone else 8) . I can't say if they will work in your revolver.


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PostPosted: Sun Aug 14, 2016 5:48 pm 
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Joined: Sat Jan 25, 2014 9:16 pm
Posts: 1277
Location: United States
If in a Crosman springer then for accuracy you have a lot more than the pellets speed to worry about. To make more power/speed the gun has to work harder and will have a more violent firing cycle which will change and likely upset accuracy. So you drop from 700 to 500 and it's more accurate it'll have little to nothing to do with the pellets speed and everything to do with the gun. For the pellet itself I haven't experimented much for the aforementioned reason ruining any hope of useful data, but apparently there's a line ~500-550fps that target shooters don't like to cross, then a second one ~890 that hunters don't like to cross. Another concern is how that gun is making that power. If it's a CA setup with a short stroke then it will likely not work as well as a full stroke with a weaker spring, or worse, a hole in the piston.
I think the brand pellet you choose will have a greater effect than speed. Plus there's the barrel which is the biggest factor, and if a Crosman then it's likely chinese? I guess I'd just buy some JSB 18gr and H&N Barracuda of 18-21gr that'll no doubt tame the gun a bit and be very stable for best accuracy, and the rest is up to the limits of you, the gun and what work you do to it.
If you're killing stuff at 30yrds then I'd certainly opt for the heavy pellets at 500 than a light wadcutter at 500.


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