I've just gone through the new gun fitting bit with my daughter.
She had grown-up and over time had compensated for the gun fitting her at 16 but not at 22.
More cast on the gun and adjustable comb was required having first found a gun already cast to suit a lady in the first place.
I learned a few things,
- I thought I knew quite a bit but found I knew very little - it is an art as well as science.
- I was surprised that the pitch & then cast at the heel and toe mattered a lot and the cast required at the comb was different (slightly less).
- It was worth the 400 miles or so getting the right gun and then alterations.
- There were quite a few problems with her technique but they disappeared as the gun fit got better. My daughter was worried it would take her time adjusting but it didn't, albeit there is still a little work to do.
- You can't do it yourself.
- Your mate (or father) can't do it for you.
- She now loves the gun.
- Dropping to 24g or 21g just reduces a problem - if it disappears its a minor problem but its still there.
At the end of the day a few £100's getting the gun right makes the £1,000's a year we spend on clay's and cartridges much better value. If you have bought an F3 you have the money get it fitted right.
Get someone like Ben to fit it (other, smaller, gun fitters, are available). Shoot it. If its still a problem get it fitted again - your technique may have changed, for the better, from the first fitting.
And finally - Custom guns are made for you at that 'fitting'. They should be right but sometimes are not for various reasons. I have heard more than one gunsmith talk about changing such guns to get them to fit at a later date.