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Thread: Barrel "Conditioning".

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  1. #1
    Join Date
    Feb 2012
    Location
    Atherstone
    Posts
    34

    Lightbulb

    Quote Originally Posted by u.k.neil View Post
    I have lost count of the number of times I have seen shooters on a sighting in range with four or five different makes of pellets opened in front of them, taking five or so shots with each type and then saying that their gun is not grouping.

    Whenever a brand of pellets is changed (sometimes even different batches of the same pellet) or if the barrel has been cleaned then the barrel has to be "conditioned" to that particular pellet by putting at least ten shots (I do 20 to be on the safe side) through it before trying a group.

    Different brands of pellets have different percentages of elements in them which affect hardness, coefficient of friction, B.C's etc which all have an effect.

    Just thought a "Heads-Up" on this subject might stop a bit of frustration....

    Neil
    Thanks for that, Neil. I never thought of this before in relation to pellet changes, although it seems general knowledge that you need to 'condition' after a barrel clean. Might account for the problems I've been experiencing with grouping a BSA Supersport CC - although its a 22 and can't be expected to group as closely as a 177 - or can it?

    Cheers - datadave

  2. #2
    Join Date
    Jan 2012
    Location
    Redditch
    Posts
    76
    after measuring the pellet skirt of top quality JSB reds in 4.52 skirt I have detected 4.569mm to 4.513mm and the 5.10gram mass from 5.07 to 5.18 gram, I think that is more likely to give bad grouping at 45 yards+ than any barrel issue, wash, weigh and size every pellet if you plan on trying to put them through a keyhole over 25 yards.

  3. #3
    Join Date
    Jun 2012
    Location
    clacton on sea
    Posts
    268
    I posted a simular thread on the Daystate owners site a while back, I have been shooting air guns for 50 years and have never used a pull thru on any of them.
    On my fire arms and shotguns yes but never on a air gun, Because of the cordite etc that can not be left in the barrel.

    Barrels are simular to cylinder bores in car engines they have to be run in and once you have found a pellet brand that works stick with it .
    Barrels are formed in different ways, Hammer forged, Button drawn or die cut and none of them leave a really smooth finish under the m/scope more like the Alps in fact.

    I found the much praised JSB pellets are made from a very soft materel and would take a fair thru to run a barrel in.
    Where as Crossmans alot harder and run in very quickly.

  4. #4
    Join Date
    Nov 2011
    Location
    Raymond Terrace
    Posts
    87
    Its a bugger swapping about with ammo, considering the variables that come into it, Iv settled on one pellet for the air gun, one subsonic for the .22rf and one type for the HMR, less mucking about and 'stuff' going on.

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