Thanks for the responses,
Eightbore, I wish I could afford a Purdy, the gun is a Husqvarna 350.
Richard, I will try Galazan's trigger guard bumper, thanks.
Old Colonel, I don't think it's my mount because I can shoot another sxs at the same skeet round, without any problems.
(I shoot low gun)
The stock is actually a lot longer than I usually shoot.
I usually use a stock with 14" length of pull, this one is 14 3/4"
length of pull, but it's a straight stock and I find I can shoot a straight stock with a much longer pull.
Thanks, Pete