Hi all.
I am experiencing difficulties with my .38-303 (.303 British blown out to .375).
It had been grouping well at 100m with WLR primers but I have just purchased a new batch of such and now it is stringing vertically.
Is it possible that such a can of batch could be responsible?
cheers
CBK

Hi all.
I am experiencing difficulties with my .38-303 (.303 British blown out to .375).
It had been grouping well at 100m with WLR primers but I have just purchased a new batch of such and now it is stringing vertically.
Is it possible that such a can of batch could be responsible?
cheers
CBK

It could be. Usually not much variation between lots of primers, but there occasionally is. May not be anything "wrong" with the new batch, just that their ignition charactoristics are different.... could be that a different loading using those new primers could group just as well as the first batch.

Won't hurt to give that bolt a good cleaning...even a little drag on the firing pin from some congealed grease or a draging spring can change how a rifle shoots...would be a devil of a coincidence that it just happened to give trouble right when you switch primers, but checking it is free so it won't hurt abything to try.

Hi all.
I stripped the rear sights and forend off the rifle and refitted them both. The gunsmith may have not tightened the sight properly as one of the screws seemed a bit loose. The rifle is shooting fine again though I have been using large pistol primers however they used to shoot the same as the rifle.
May have been a case of me 'having a screw loose'!!
cheers
CBK