I would appreciate some help from those with more experience. I am reloading some Sierra 160gn SPRN (1750) in 6.5x55. I have a max length (head to Ogive) using comparator of 92.75mm (3.651") and have set my seated bullet at 92mm. 30Thou back. I usually run at about 10thou back with SST and other 140 gn bullets.
I am finding closing the bolt is hard and on opening the bolt I can feel resistance as the bullet is being pulled out of the rifling. On further inspection there are rifling marks on the bullet. I assume this is to do with the shape of the bullet being rather blunt and as the bolt travels in and the sprung extractor is against the head it is pushing bullet into lands before extractor is pushed home.
I have measured col after removing from chamber and it appears that bullet is not being seated any further due to this but I am concerned.
PS these rounds are to be for load development to hopefully find a accurate one for a coming moose/boar hunt. So I want them right, don't want to fluff up a chance if one should present itself.