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
To be honest Neil that is sort of what I do.

I tend to shoot 5-10 5 shot groups at zero range with each type without cleaning in between.

I then repeat the operation using those that grouped the best on a clean barrel.

It is interesting just how the hardless etc of a pellet affects the conditioning time.

They adjust much quicker on a dirty barrel, but some pellets just like a clean barrel to start with...it aint astro physics though.