I had my action screws out and filed the front screw down a bit..
It could possibly go in to far and touch the barrel chamber..
I tightened it up pretty tight after and the bolt didn't bind so this may have done the trick. The next time I take a look I will put some marker pen or something on the end of the screw and see if any of it rubs off on where it could touch that way I will know if I've licked enough off..!!
Thanks for that top tip 😁👍