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Theoben Sirocco


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After finding my old theoben sirocco in the attic where its been for over 10 years I stripped it and greased the gas ram which had dried out. I put a new scope on (JSR 3-9x40) and started trying to zero it. To cut a long story short I have spent weeks trying different pellets and cut a 6 inch group with eley wasps down to around an inch at 25 meters with aa fields.... not perfect I know but not bad for a 18+ year old gun thats spent most of its life in the attic!!!

 

After checking the zero yesterday i felt confident to try it out at first light this morning. Theres about an acre of woodland behing my house which my parents own, there was a crow sat high in a tree giving me around a 25m shot. I was standing but steadied the gun, pulled the trigger and thud. I hit it but in the body :( . It dropped like a stone and a quick shot to the head killed it. I checked the zero on a target and all seemed good so I just went out and there was a pigeon sat in a closer tree allowing me to rest on a wall behind the house. This is a fairly tall tree so prbably a 25-30m shot. I lined the crosshair up on his head nice and steady, pulled the trigger and thud... the pigeon dropped. Again the pellet landed low, at the base of its neck. It wasn't moving but was still alive, so a shot to the head to finish it.

 

I'm happy the rifle now seems to be working well but not happy with my shooting not giving instant kills. When aiming up into trees should I be using hold over??? Or have I underestimated the distance and its further than i thought??

 

The shot was from the wall just in front of me to the tallest tree in the center.

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The Pigeon

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Sorry about the quality they were taken with my phone and it was starting to get dark.

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No, that's not correct at all.

 

Always hold-under when shooting at an incline! How much so depends very much on a variety of factors including the angle of incline, range and the velocity of your pellet.

 

Do a search on here, there's a very good piece written by Si (Zini) that I seem to remember reading on the subject a while back.

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My little Scirocco makes nice one hole groups out at thirty yards. They are an extremely accurate tool, even if they've sat in the attic for ages. They were very high quality when built, and it shows!

 

There's an interesting article on the effects of high angle of elevation shooting HERE (clicky)

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No, that's not correct at all.

 

Always hold-under when shooting at an incline! How much so depends very much on a variety of factors including the angle of incline, range and the velocity of your pellet.

 

Do a search on here, there's a very good piece written by Si (Zini) that I seem to remember reading on the subject a while back.

spot on mate! i do my pigeon shooting from a hide under a big tree well known for pigeons, i shoot more or less the same distance, but when some birds land on the very top of the tree, the steeper the angle means more hold under, sounds daft but its true, chris

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I have found it shoots well with Accupel, Napier UPH and RWS Super hollow points. The RWS are really good for close in work, but also seem to work well at distance. I keep meaning to run them over the chrony and see what the energy is like at range with the different pellets.

 

I love my Scirocco, she's a lovely little rifle to shoot!

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Good shooting mate :) The thing to remember with shooting uphill is that the steeper the angle the greater the change in point of impact from your initial zero, and this POI is Above the centre crosshair, or Hold Under.

 

If you are zerod at 25m you can have your barrel at an angle of around 20 degrees and still use the centre crosshairs out to 28m for a 1" killzone.

 

A 40 degree angle - crosshairs from 33 to 38m and 1" kill zone.

 

However if your under the trees and shooting at distances under 30m then the hold under will be massive as the POI will be anything from 7 to 10cm from your horizontal zero, meaning anything up to 4 to 5 Mildots of hold under and this can be more than some reticles have on them.

 

If this technical stuff is your cup of tea get chairgun pro, as it is, without a doubt one of the best bits of ballistics software about.

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