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  #21  
Old 13th July 2016, 01:08 PM
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All my research into this indicated that it's great for FAC .22 (I owned a Royale 400 and agree with this statement) but in .177 at sub 12fpe, it's not.

I haven't owned one in 177 sub 12fpe though. But I do remember reading an article (in Airgun World I think) when they were first released about how they're still working on the 177.

My guess is the physics of the low power, smaller caliber just can't be done. I'm sure they've tried as best they could too.
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  #22  
Old 13th July 2016, 05:52 PM
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This will throw a cat among the pigeons!
I have an FX Bobcat smooth twist in 0.177 running at 11.5 ft/lbs on JSB 4.52s 8.44 grains and it groups as well as my Walther Dommie at 55 yards (sub half inch groups and sometimes edging previous pellet). Shot from FT seating position.
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Last edited by Steve Hebby; 13th July 2016 at 05:55 PM.
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Old 13th July 2016, 10:13 PM
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Hi steve, have you ever fired a pellet through it into ballistic jelly or similar to check the pellet for any rifleing marks or otherwise?.
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Old 13th July 2016, 10:29 PM
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I have pushed pellets through a .22 smooth twist, they had a very subtle flower petal shape to them with I think 5 petals? but you had to look close to see it, to the naked eye they just looked smooth.

The barrels are turned down on the O/D for the last 3" of the their length before the swaging process, then a sleeve is fitted over the swaged smaller dia section and the barrel O/D ground and blued. You need to look very carefully to see the join!
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Old 14th July 2016, 06:55 AM
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It'd be interesting to measure the BC you're getting Steve - we'll have to arrange something while you've still got the gun.
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Old 14th July 2016, 09:05 AM
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Quote:
Originally Posted by fireblade View Post
Hi steve, have you ever fired a pellet through it into ballistic jelly or similar to check the pellet for any rifleing marks or otherwise?.
Hi Dave,

No I haven't pal!
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Old 14th July 2016, 09:08 AM
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Quote:
Originally Posted by Brian.Samson View Post
It'd be interesting to measure the BC you're getting Steve - we'll have to arrange something while you've still got the gun.
Hurry up then pal you know me You can certainly borrow it if you want to do some testing at that range of yours.
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Old 14th July 2016, 11:58 AM
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Originally Posted by Steve Hebby View Post
Hurry up then pal you know me You can certainly borrow it if you want to do some testing at that range of yours.
Before you sell it, if I could borrow it for a day (when it's not too windy) I can get a 55 yard BC reading for it - assuming I trust that ST barrel not to hit my downrange chrono

Unfortunately, the ProDigital chrono I use for downrange testing doesn't work under the lights in the range, although I could probably rig up a steel plate with a 40mm hole to sit in front of my Polish Chrono at the range.. that would be fairly safe, if I do it when we're not open to the public.

btw - I've got that Pistol grip for the SMK sitting around waiting until I see you next ( assuming you haven't sold it already )
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  #29  
Old 14th July 2016, 09:47 PM
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The smooth twist barrel on my .177 sub 12 ft-lb FX Wildcat groups fine.
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Last edited by Kgbmark; 15th July 2016 at 07:29 AM. Reason: spelling
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