AA s400 pellet problem

[rams4027]

Can anyone help out with pellet choice , for a .177 AAS400 as I’m finding it hard to get a good grouping.Tried putting napier pellet lube on the pellets but made it worse.

[Steve C.]

Can anyone help out with pellet choice , for a .177 AAS400 as I’m finding it hard to get a good grouping.Tried putting napier pellet lube on the pellets but made it worse.

Usual suspects, JSB or AA Fields.........But first clean barrel (with a pull through if poss) and then check power level over a chrono. I wouldn't fill to over 180 bar.

Steve C.

[Dagwood]

Usual suspects, JSB or AA Fields.........But first clean barrel (with a pull through if poss) and then check power level over a chrono. I wouldn't fill to over 180 bar.

Steve C.

As Steve suggests plus I use Superdomes up to 30yds, JSB Heavy and Accupells when shooting 50m target shooting althoughthe Accupells can suffer badly if there is a strong breeze.
If I fill up to 190 I have no problems but if it goes to 200 I find the first half dozen or so shots can be off zero vertically but doesn't affect horizontal POI.
Don't forget to use the pull through, if you have one, from the breech to the muzzle; using it the othe way round is supposed to risk pulling out the breech o rings.
hth
Jim

[Archer50]

Usual suspects, JSB or AA Fields.........But first clean barrel (with a pull through if poss) and then check power level over a chrono. I wouldn't fill to over 180 bar.

Steve C.

What Steve said. Some AA barrels are fussy about cleaning - AA recommend every 250 shots, and I find that's about right.

Alan

[rams4027]

cheers guys for the tips, I'll give them a go and see how I get on.👍

[Trumpetier]

My S400k in . 177 loved Webley Accupell F.T

[Rob2hook]

I have a 2007 S400 which came from the original owner with AA Diabolo Field headsize .452. Despite their age, they seem to be in perfect condition and the rifle likes them. Much to my chagrin, another member of the local club asked to try it and rang the bell target at 30 yds with three consecutive shots! It took me a while to find the target...

This larger, but popular, headsize fits nicely in the breech and you can just feel it pop past the seal as you close the bolt.

Took the old girl back to the range yesterday. Bit windy but can't waste a rest day. The Range Officer also had no problem ringing the bell with it. I must get some practice in!

Rob.

[svendogg]

4.52 jsb exacts are accurate as hell in mine, currently working through a tin of jsb RS but don't think they're quite on par yet

[rams4027]

so what size grouping are you getting at say 30,40,& 50 yards.
mark

[severnsider]

Can anyone help out with pellet choice , for a .177 AAS400 as I’m finding it hard to get a good grouping.Tried putting napier pellet lube on the pellets but made it worse.

Mine is fine with the JSBs, but just a thought...……. is the probe 'O'-ring in good condition? They can be damaged and then you lose a bit of air back past the probe. As has been mentioned, don't fill above 170-180 bar.

[max headroom]

mine loved wasps. (dont know if they still available). wash them and wax them.

[svendogg]

so what size grouping are you getting at say 30,40,& 50 yards.
mark

5p sized 10 shot groups at 40, if I do my bit. That's rested at indoor range so ideal conditions

[Brimfire]

JSB Exacts 4.52mm work pretty well in my S400F.
The barrel gets a couple of VPD felt cleaners through it every now and then but I've never found the accuracy to suffer between cleanings.
Agree with the 190 bar charge.

[max headroom]

JSB Exacts 4.52mm work pretty well in my S400F.
The barrel gets a couple of VPD felt cleaners through it every now and then but I've never found the accuracy to suffer between cleanings.
Agree with the 190 bar charge.

you dont use a stirrup pump then. takes me ages to get to 180. get a flat belly and too knackered to go out.